# Dumbarton Castle

castle in West Dunbartonshire, Scotland, UK

West Dunbartonshire, United Kingdom

Fortification

## Story

• Dumbarton Castle stands on a basalt plug where the Leven meets the Clyde, a rock 73 or 74 metres high with the longest recorded strength of any stronghold in Scotland.
• From the fifth century it was Alt Clut, centre of a Brittonic kingdom, and in 870 or 871 Amlaíb Conung and Ímar took it after a four-month siege.
• It was a royal castle from the thirteenth century, a refuge for David II after the Battle of Halidon Hill, and the port from which Mary, Queen of Scots sailed for France in 1548.
• Most of the standing fabric is an eighteenth-century artillery fort, with John Romer’s Governor’s House and King George’s Battery of the 1730s.
• The castle was bombed in May 1941, and a 2025 exhibition shows the 1970s finds, including a Viking sword pommel and a ceramic cross that may be much later than it looks.

## Visiting

From 1 April to 30 September the castle is open daily from 9.30am to 5pm. From 1 October to 31 March it is open from 10am to 4pm on Monday, Tuesday, Wednesday, Saturday and Sunday, and it is closed on Thursday and Friday. Last entry is 45 minutes before closing. The castle is closed on 24 December and remains closed until 4 January.
Adult admission is £7.50 online and £8.50 in person. Concession admission is £6 online and £6.80 in person. Admission for a child aged 7 to 15 is £3.50 online and £4 in person. Members pay no entrance fee.
Visitors with disabilities pay the standard admission, and up to two carers with them pay no entrance fee. Dogs are not allowed to enter, except assistance dogs, which are allowed to enter. Visitors may not enter the French Prison.

## History

Dumbarton Castle occupies a basalt plug where the River Leven enters the Clyde. The rock formed in the Early Carboniferous, between 330 and 340 million years ago, and its height is given both as 73 metres, or 240 feet, and as 74 metres at White Tower Crag. Its oldest name is Alt Clut, the Rock of the Clyde, and the later Gaelic Dùn Breatann produces the modern name.

From the fifth century to the ninth the rock was the centre of a Brittonic kingdom, later called the Kingdom of Strathclyde. Saint Patrick’s letter names its king as Ceretic of Alt Clut, also Ceretic Guletic, and Riderch Hael, or Rhydderch Hael, ruled there in the later sixth century and the early seventh. Picts and Northumbrians took the fortress in 756 and lost it within days, and a further destruction is placed in 780.

In 870, and also in 871, Amlaíb Conung and Ímar besieged the rock for four months until the water failed. They carried British, English and Pictish captives to Ireland in two hundred ships, and Arthgal ap Dyfnwal was killed in 872 at the wish of the Pictish king Causantín. The chief place then moved up the Clyde toward Govan and Partick, though one account still calls the rock the old capital and another says it was never the capital of Strathclyde.

Digging in 1974 and 1975 found a timber-laced rampart, sixth-century Mediterranean amphorae, Germanic glass, and crucibles that held gold and silver. The idea of a nuclear fort was disproved, while cross-slabs of about 1000 show an elite site and a chapel again after the Viking sack. A Viking sword pommel and more than three hundred objects from that dig are now on display.

Alexander II kept the castle as a royal fortress in 1238, outside the earldom of Lennox. In 1296 it held out for two months and then fell, and Sir John de Menteith’s capture of William Wallace in 1305 is tied to a stay here that is believed, doubted, and also stretched by a later poem to two months. In 1308 Menteith brought the castle to Robert the Bruce, who did not slight it, and the king’s organs are placed both in St Serf’s Church in Dumbarton and at the old church of Cardross.

After the Battle of Halidon Hill on 19 July 1333, Malcolm Fleming sheltered David II and Joan, sent them to France, and held Dumbarton against an English siege. Fleming became Earl of Wigtown, and in 1361 the Black Death killed a third of the garrison. In 1425 James Mor Stewart burned the town and killed one keeper, while John Colquhoun held the castle and received the governorship.

James IV made the anchorage his base against the Isles, gave the castle to Margaret Tudor in 1503, and in 1489 had Mons Meg hauled from Edinburgh during the recovery of the rock. In 1540 James V arrived with Cardinal Beaton after sailing round Scotland. During the Rough Wooing, Mary, Queen of Scots was lodged here by February 1548 and sailed for France that summer, on 7 August after a delay, or in four galleys after about six months.

She visited again in 1563. After the Battle of Langside in 1568 she failed to reach the castle and went to England, and the king’s men took it by ladders on 1 April 1571, a date also given as 2 April. From the seventeenth century the castle was a garrison and a state prison, and women carried lime and sand up the rock in 1617, 1629 and 1633.

Francis Montgomerie of Giffen, named governor in 1696, had already recorded a decayed armoury in 1668. The guns last fired in anger in September 1715. Captain John Romer’s works of the 1730s, with King George’s Battery and the Governor’s House built by William Adam, gave the castle the face it has now.

Jacobites were held after Culloden, and General Edouard Simon was confined from 1812 to 1814. Francis Dundas was governor from 30 January 1817, a date also given as 1819. The state took ownership in 1909, five hundred soldiers occupied the rock in the First World War, and bombs in May 1941 damaged the Governor’s House and destroyed 70 feet of the east wall.

Alexander Patrick Drummond Telfer-Smollett, Alastair Stevenson Pearson and Donald David Graeme Hardie were keepers in turn after the war. The castle was listed in 1971, scheduled on 25 April 1994, and removed from the buildings list in 2018, while it remains a scheduled monument. The exhibition Rock of Ages opened in July 2025 and shows, beside the excavation finds, a ceramic cross of 1995 whose titanium oxide crystals may make it far later than its shape suggested.

Six hundred and twenty-seven steps climb to White Tower Crag. In a usual year more than 25,000 people make the ascent.

## Photographs

- [Dumbarton Castle, West Dunbartonshire, Scotland - south entrance — Otter](https://upload.wikimedia.org/wikipedia/commons/f/fd/Dumbarton_Castle_20090607_south_entrance.jpg)
- [artwork in AAAGM collection — James Mérigot](https://upload.wikimedia.org/wikipedia/commons/6/65/Dumbarton_Castle_by_J._Merigot_-_James_M%C3%A9rigot_-_ABDAG011936.jpg)
- [Dumbarton Castle The presence of a settlement here is first recorded in a letter St Patrick wrote to King Ceretic, the British King of Strathclyde in around — Stuart MacInnes](https://upload.wikimedia.org/wikipedia/commons/6/61/Dumbarton_Castle_-_geograph.org.uk_-_309171.jpg)
- [Dumbarton Castle Dumbarton Castle from levengrove park — Eddie Mackinnon](https://upload.wikimedia.org/wikipedia/commons/7/75/Dumbarton_Castle_-_geograph.org.uk_-_367402.jpg)
- [Dumbarton Castle A long shot from across the River Clyde,taken near the start of the M8. South of the centre of Dumbarton rises the 240ft high twin peaked — Dave Hitchborne](https://upload.wikimedia.org/wikipedia/commons/9/93/Dumbarton_Castle_-_geograph.org.uk_-_501609.jpg)
- [Dumbarton Castle Viewed from across the Clyde at Westferry. — Thomas Nugent](https://upload.wikimedia.org/wikipedia/commons/8/88/Dumbarton_Castle_-_geograph.org.uk_-_634495.jpg)
- [Dumbarton Castle Sited on Dumbarton Rock, here was the capital of the old British kingdom of Strathclyde. — Colin Smith](https://upload.wikimedia.org/wikipedia/commons/6/65/Dumbarton_Castle_-_geograph.org.uk_-_888118.jpg)
- [Dumbarton Castle The earliest reference is to Dumbarton Castle is in 450AD, which gives it a recorded history as a stronghold longer than any other — PAUL FARMER](https://upload.wikimedia.org/wikipedia/commons/3/30/Dumbarton_Castle_-_geograph.org.uk_-_1517961.jpg)
- [Dumbarton Castle viewed from a boat on the River Clyde, near Greenock. Own photo cropped to create a Wikivoyage banner. — AlasdairW](https://upload.wikimedia.org/wikipedia/commons/e/e3/Dumbarton_banner_Castle_from_the_river.JPG)
- [Title from the Detroit Publishing Co., catalogue J-foreign section. Detroit, Mich.: Detroit Photographic Company, 1905.; More information about the Photochrom — Photochrom Print Collection](https://upload.wikimedia.org/wikipedia/commons/2/28/Castle_from_pier%2C_Dumbarton%2C_Scotland-LCCN2001705975.jpg)

## Sources

- [Dumbarton Castle](https://en.wikipedia.org/wiki/Dumbarton_Castle) — Wikipedia
- [Kingdom of Strathclyde](https://en.wikipedia.org/wiki/Kingdom_of_Strathclyde) — Wikipedia
- [Amlaíb Conung](https://en.wikipedia.org/wiki/Amla%C3%ADb_Conung) — Wikipedia
- [Arthgal ap Dyfnwal](https://en.wikipedia.org/wiki/Arthgal_ap_Dyfnwal) — Wikipedia
- [David II of Scotland](https://en.wikipedia.org/wiki/David_II_of_Scotland) — Wikipedia
- [Battle of Halidon Hill](https://en.wikipedia.org/wiki/Battle_of_Halidon_Hill) — Wikipedia
- [Mary, Queen of Scots](https://en.wikipedia.org/wiki/Mary,_Queen_of_Scots) — Wikipedia
- [William Wallace](https://en.wikipedia.org/wiki/William_Wallace) — Wikipedia
- [Robert the Bruce](https://en.wikipedia.org/wiki/Robert_the_Bruce) — Wikipedia
- [James Mor Stewart](https://en.wikipedia.org/wiki/James_Mor_Stewart) — Wikipedia
- [Francis Dundas](https://en.wikipedia.org/wiki/Francis_Dundas) — Wikipedia
- [Dumbarton Castle: Statement of Significance](https://www.historicenvironment.scot/publications/all/publication/?publicationId=907e4567-610d-447d-966e-a75300e26948) — Historic Environment Scotland
- [Plan your visit: Dumbarton Castle](https://www.historicenvironment.scot/visit/all/dumbarton-castle/plan-your-visit/) — Historic Environment Scotland
- [Historic artefacts now on display at Dumbarton Castle](https://www.historicenvironment.scot/about-us/news/historic-artefacts-now-on-display-at-dumbarton-castle/) — Historic Environment Scotland
- [Using science to understand an archaeological object: the Dumbarton Cross Pendant](https://blog.engineshed.scot/2025/07/09/using-science-to-understand-an-archaeological-object/) — Engine Shed
- [Reconnaissance excavations on Early Historic fortifications and other royal sites in Scotland, 1974-84: 4, excavations at Alt Clut, Clyde Rock, Strathclyde, 1974-75](https://journals.socantscot.org/index.php/psas/article/view/9385) — Proceedings of the Society of Antiquaries of Scotland
- [Dumbarton Castle 20090607 south entrance.jpg](https://commons.wikimedia.org/wiki/File:Dumbarton_Castle_20090607_south_entrance.jpg) — Wikimedia Commons
- [Dumbarton Castle by J. Merigot - James Mérigot - ABDAG011936.jpg](https://commons.wikimedia.org/wiki/File:Dumbarton_Castle_by_J._Merigot_-_James_M%C3%A9rigot_-_ABDAG011936.jpg) — Wikimedia Commons
- [Dumbarton Castle - geograph.org.uk - 309171.jpg](https://commons.wikimedia.org/wiki/File:Dumbarton_Castle_-_geograph.org.uk_-_309171.jpg) — Wikimedia Commons
- [Dumbarton Castle - geograph.org.uk - 367402.jpg](https://commons.wikimedia.org/wiki/File:Dumbarton_Castle_-_geograph.org.uk_-_367402.jpg) — Wikimedia Commons
- [Dumbarton Castle - geograph.org.uk - 501609.jpg](https://commons.wikimedia.org/wiki/File:Dumbarton_Castle_-_geograph.org.uk_-_501609.jpg) — Wikimedia Commons
- [Dumbarton Castle - geograph.org.uk - 634495.jpg](https://commons.wikimedia.org/wiki/File:Dumbarton_Castle_-_geograph.org.uk_-_634495.jpg) — Wikimedia Commons
- [Dumbarton Castle - geograph.org.uk - 888118.jpg](https://commons.wikimedia.org/wiki/File:Dumbarton_Castle_-_geograph.org.uk_-_888118.jpg) — Wikimedia Commons
- [Dumbarton Castle - geograph.org.uk - 1517961.jpg](https://commons.wikimedia.org/wiki/File:Dumbarton_Castle_-_geograph.org.uk_-_1517961.jpg) — Wikimedia Commons
- [Dumbarton banner Castle from the river.JPG](https://commons.wikimedia.org/wiki/File:Dumbarton_banner_Castle_from_the_river.JPG) — Wikimedia Commons
- [Castle from pier, Dumbarton, Scotland-LCCN2001705975.jpg](https://commons.wikimedia.org/wiki/File:Castle_from_pier,_Dumbarton,_Scotland-LCCN2001705975.jpg) — Wikimedia Commons

## Detailed history

Dumbarton Castle stands on Dumbarton Rock in West Dunbartonshire, where the River Leven meets the River Clyde. The rock is a volcanic plug of basalt. It formed between 330 and 340 million years ago, in the Early Carboniferous, when volcanoes were active in the ground where Glasgow now stands. Softer rock weathered away and left the plug. The rock is also described as the remnant of lava that solidified in the crater of an Early Carboniferous volcano. It is protected for that geology as well as for the fortress. The west peak, White Tower Crag, is given as 74 metres and as the highest part of the rock. The whole rock is also given as 240 feet, or 73 metres. It is roughly oval, about 275 metres from east to west and about 200 metres from north to south. A gully running toward the north-west divides the summit. The eastern summit, the Beak, is lower and has a fairly level top of about 30 by 20 metres. Crags ring the rock. The south side is the least sheer. The best usable ground lies between the two peaks. Into the seventeenth century the rivers almost encircled the rock at high tide. The boggy ground on the north-west was drained only around 1800. Later industry, then housing and a football stadium, took that reclaimed land. Until the channel of the Clyde was deepened, a ford at Dumbuck, about 2 kilometres to the east, was the lowest crossing.

The first recorded name is Alt Clut, the Rock of the Clyde. Bede, in the early 700s, called it Al Cluith and described a strongly defended centre of the Britons. Other spellings are Al Clud and Alclud. Sometime after 900 the place became Dùn Breatann, the fort of the Britons, though that Gaelic name is not written down until the twelfth century. Dumbarton comes from it. Around 1700 the castle and the town were still called Dumbritton. The rock guards the point where the Leven, with its way toward Loch Lomond and Stirling, joins the Clyde, and it overlooks a deep-water anchorage. Until the first parts of the Lang Dyke opened in 1773, this was the last stop for shipping before Glasgow. The road toward Argyll and the west highlands passed here as well.

People used the rock from the Iron Age. Archaeological finds show a settlement of strategic value at least that far back. In the Roman period the people here traded with the Romans. A possible very early notice sits in Ptolemy’s geography, drawn from campaigns around the year 85. On the north bank of the Clyde he places the Lemannonios kolpos, a name that can be read as the bay of the Leven and might mean the harbour under the rock. Four highland lochs have also been proposed for the same name, so the identification is not settled. If it is this rock, Roman forces knew it at least as a landmark. The rock is likely to have been a fort of the Damnonii, whose territory once stretched from the Clyde toward Strathearn. In post-Roman times that ground was associated with the Maiatai, a people not to be confused with the later kingdom. Romano-British fine tableware of the first to fourth centuries has been found on the rock.

The first written notice of a settlement is a letter of Saint Patrick, late in the fifth century, to a ruler in western Britain. The king is Ceretic of Alt Clut, also Ceretic Guletic, and he has been identified with Coroticus, the Brittonic warrior Patrick accused of seizing and enslaving converts from his communities in Ireland. From about the year 900, and perhaps earlier, Irish writers identified that Coroticus as an early king of Dumbarton, and they asserted that Patrick himself came from this district. Kilpatrick was named as his birthplace. Current scholarship does not support that birthplace. The story still took hold. In one telling the devil, angry at Patrick’s preaching, sent witches after him. Patrick sailed for Ireland, the witches hurled a boulder to sink him, they missed, and the boulder became the rock. Joscelin of Furness, writing a life of Patrick, came to Dumbarton in the twelfth century to collect local stories. Church dedications to the saint in the district show how close the association became, whether or not Patrick was born here.

From the fifth century until the ninth, the rock was the centre of an independent Brittonic kingdom. Its early name, Alt Clut, became a name for the kingdom itself. The Kingdom of Strathclyde is the later name of that Brittonic realm. At its greatest extent in the tenth century it stretched from Loch Lomond in the north to the River Eamont at Penrith in the south. Its language was Cumbric, close to Old Welsh, and its people were called Cumbrians. Neighbours called the enlarged kingdom Cumbraland. It may have been founded by the Damnonii. Anglo-Saxon settlement from Northumbria left a few place-names. Viking or Norse-Gaelic settlement came later, though less heavily than in Galloway. It is unclear whether Gaelic settlement began before the eleventh century. The kingdom seems to have been taken into the kingdom of Alba in the eleventh century. There are no further mentions of the kingdom of Strathclyde after about 1050. By around 1060 Malcolm III, who reigned from 1058 to 1093, appears to have held at least the heartland. One reading says the rock was the capital of Alt Clut and, after the Viking sack, that the capital moved to Govan and the kingdom took the name Strathclyde. Another reading says the rock was never the capital of the kingdom of Strathclyde, a claim often repeated, and that after 870 power shifted east into Clydesdale and south into Cumbria. In the tenth century Gaelic language and culture began to spread through the district that became Lennox.

The king of Dumbarton in about 570 is named as Riderch Hael. He is the same ruler as Rhydderch Hael, called the Generous, also Riderch I of Alt Clut, and he is placed from about 580 to about 614. He is one of the famous kings of the old north and appears often in later Welsh and Latin writing. By his time much of the wider territory had been taken by Bernicia or by the Picts, leaving a remnant around the rock. A fort here was besieged by Áedán of Dál Riata while Riderch ruled, around the year 600. Merlin, also Myrddin Wyllt, was said to have stayed at Alt Clut under Riderch before he went to live in the wild as a prophet and a recluse. One medieval life marries Merlin’s sister to the king. These are later literary placements, not a contemporary diary of the court.

King Arthur is tied to the rock only in legend. A medieval chronicle records the story that Arthur left Hoel of Brittany, his nephew, sick at Alcluit in Scotland. Hoel recovered, then was besieged by the Scots and the Picts. The tale first appears in Geoffrey of Monmouth’s history of the kings of Britain, where Arthur fights the Scots and the Picts to relieve his nephew in Alclud and pursues them without mercy. In the triads, the third unrestrained ravaging is Aeddan Fradog, perhaps Áedán mac Gabráin, coming to the court of Rhydderch the Generous at Alclud and leaving neither food nor drink nor beast alive. That episode is also folded into stories of Merlin and is sometimes conflated with the Battle of Arfderydd, which some writers place at Arthuret. A separate Highland tradition speaks of An Talla Dearg, the Red Hall. A seventeenth-century genealogy of Campbell chiefs claims descent from Arthur through his son Smerevie Mor, and says Smerevie Mor was born in Dumbarton on the south side, in the red hall, in Gaelic the tower of the red hall. A red tower is documented in 1451, and it is supposed to have stood roughly where the Governor’s House stands now. Whether the Red Hall owes anything to an older Arthur tradition is open. Modern historians accept that the castle was linked to Arthur in Highland storytelling.

In 756 a joint force of Picts and Northumbrians captured the fortress after a siege and lost it again within a few days. That is recorded as the first and the second loss of the rock. The annals also record a siege and destruction in 780. The fort was rebuilt. By 870 it was a tightly packed British settlement, both a fortress and the chief place of Alt Clut.

In 870, and also in 871, the Viking kings Amlaíb Conung and Ímar besieged the rock. Amlaíb Conung, whose name is the Old Norse Óláfr and whose epithet simply means king, died about 874. He was a son of the king of Lochlann, named in a later Irish compilation as Gofraid, and a brother of Auisle and of Ímar. Some scholars also place Halfdan Ragnarsson as a brother, and some identify Amlaíb with Olaf the White of the Icelandic sagas. The Irish annals call Amlaíb, Ímar and Auisle kings of the foreigners. Modern writers often call them kings of Dublin, after the settlement that was their base. Viking raids on Ireland are first recorded in 795. Raiders first overwintered in 840 to 841. In 841 a longphort was built at the hurdled ford that became Dublin. In 851 a large group called the dark foreigners arrived. By 853 a kingdom of Dublin claimed authority over the Vikings in Ireland. The annals for 853 say that Amlaíb, son of the king of Lochlann, came to Ireland, that the foreigners submitted to him, and that he took tribute from the Irish. A fuller later account has him bring a demand for tribute from his father and leave suddenly, with his younger brother Ímar following to levy the same tribute. Lochlann is often identified with Norway. Other historians argue that, into the time of the Battle of Clontarf in 1014, the name meant Norse and Norse-Gaelic lands in the Hebrides, Man, the Northern Isles and parts of mainland Scotland. By the twelfth century, when Magnus Barefoot sailed west, it had come to mean Norway.

Amlaíb was back in Ireland by 857 at the latest. He and Ímar fought Máel Sechnaill, overking of the Southern Uí Néill, the most powerful ruler in Ireland, whose lands lay near Dublin. The fighting may have been a contest for Munster. Máel Sechnaill took hostages there in 854, 856 and 858. In 856 a Viking raid on Lough Cend killed Gormán son of Lonán and many others and weakened the over-kings. Early fighting went the Vikings’ way. They routed Caitill the Fair and his Norse-Irish in Munster. Some writers identify that Caitill with Ketill Flatnose of later sagas, without certain proof. In 858 Ímar, with Cerball, king of Ossory, routed Norse-Irish at Araid Tíre in what is now County Tipperary. The next year Amlaíb, Ímar and Cerball raided Meath. A royal conference at Rathugh followed, and Cerball submitted to Máel Sechnaill. Máel Sechnaill died in 862 and the conflict with him ended as his lands split. Amlaíb’s Scottish raids were broken in 868 by a war against his former ally Áed Findliath, overking of the Northern Uí Néill, when several northern longphorts were destroyed. Amlaíb disappears from contemporary annals in 871. Later accounts say he returned to Lochlann to help his father in a war. The Pictish chronicle says he died in battle against Constantine I. That death is usually dated to 874.

Ímar, Old Norse Ívarr, died about 873. He was the progenitor of the Uí Ímair, who dominated the Irish Sea for centuries. Some scholars identify him with Ivar the Boneless, a commander of the Great Heathen Army in England and, in the sagas, a son of Ragnar Lodbrok by Aslaug. Ímar is absent from the Irish record between 864 and 870, which fits a man busy in England in those years, and English sources do not name Ivar after 870. In 870 the annals say that Ímar and Amlaíb captured Dumbarton Rock, the chief fortress of the kingdom, after a siege of four months. Ímar died in 873 with the title king of the Norsemen of all Ireland and Britain. A later compilation says his father died the same year. Their combined territory is thought then to have included Dublin, Man, the Western Isles, Orkney, and much of the northern and western Scottish coast, including Argyll, Caithness and Sutherland.

The siege itself lasted four months, which shows both how strongly the rock was held and how large a prize it was. One account says the fortress fell after the water supply failed. Another says it fell after the well went dry, and one possibility is that the attackers took the well in the saddle of the rock and cut the defenders off from fresh water. The kings returned to Ireland with 200 ships and a host of British, English and Pictish captives. Welsh and even a German source notice the destruction, a sign of how widely the victory alarmed people. The captives may have been for ransom or for the Dublin slave market. They may have included the ruling family. The reasons are read in more than one way. The rock may simply have been rich. The length of the siege may mean the attackers wanted the capital itself, not a quick plunder. The kings of Alt Clut may have threatened Viking sea routes, and the fortress may have worked for the Britons much as a longphort worked for Vikings in Ireland. Its fall may have opened a way into central Scotland. The mix of captives may mean the Britons held English and Pictish slaves or subjects, or it may mean this was only the recorded moment in a wider campaign that reached Lothian and the Pictish realm. A route from Dublin to York by water across the waist of Scotland is doubtful, because no waterway or easy portage joins the Firth of Clyde to the Firth of Forth. Amlaíb’s return to Britain in about 872, if the later compilation is right, fits a bid for territory rather than a raid for portable wealth.

The king was Arthgal ap Dyfnwal, who died in 872. He came from a long line of kings of Alt Clut. A tenth-century Welsh pedigree, the Harleian genealogies, makes him the son of Dyfnwal ap Rhydderch, a king otherwise unknown. Around 849, Britons burned Dunblane, a Pictish church on the southern Pictish border, during the reign of Cináed mac Ailpín. Either Arthgal or his father may have directed that burning. It is the first record of British activity of this kind since the middle of the eighth century, and it may show Alt Clut pushing into Pictish ground while Viking attacks disordered the Picts. Two years after the fall of the rock, Arthgal was killed at the behest of Causantín mac Cináeda, king of the Picts. He may have been slain still in Viking captivity, or he may still have been reigning. His son Rhun, the last king named in that pedigree, married a sister of Causantín. That marriage can be read as a reason for the killing, clearing a path for Rhun, who may have been in exile at the Pictish court when the siege began. Arthgal may instead have been left as a Viking puppet, which would also explain Causantín’s move. Or Causantín may simply have taken a chance, and Rhun may have succeeded without his help. Either Arthgal or Rhun may have been the first to be called king of Strathclyde. After the destruction, the chief place of the re-formed kingdom moved up the Clyde toward Partick and Govan. The rock itself drops out of the record until the thirteenth century.

The charred remains of an early rampart, and the objects left in its destruction, belong to this age. Excavations in 1974 and 1975, directed by Leslie Alcock with Elizabeth Alcock, tested the idea that the rock held a nuclear fort of the kind proposed at Dunadd or Dundurn. The narrow western pinnacle was not a suitable citadel for that pattern. Trenches on the eastern summit found early medieval sherds, including E ware, amphorae and imported glass, and also Roman sherds, but no early defences. A trench lower on the eastern flank, outside the later medieval wall, found the bedding trench of a timber revetment, pieces of vitrified stone, and burning. The reading is a rampart with an external timber face and beams running back through an earth and stone core, about 2 metres wide and more than 2 metres high, probably with a breastwork, overlooking the isthmus that joins the rock to the mainland. The dig disproved the nuclear-fort plan. It did not map the full circuit. An inner oval on the site of the later powder magazine was suggested and left unproven, because the trenches were too small. Three radiocarbon dates on the burnt timbers fall between the sixth and the ninth centuries. The imported pottery and glass leave no doubt of early medieval occupation. A prehistoric use is likely on such a rock and is not shown by the trenches.

The finds include the northernmost examples of Mediterranean amphorae of the sixth century, B ware that would have carried wine, olive oil or other goods from the eastern Mediterranean, and fragments from at least six glass vessels of Germanic manufacture. E ware, tableware from Gaul, belongs to the sixth to the early eighth century. Bowls, cups and beakers point to feasting. Small thin-walled crucibles show fine metalworking. Gold and silver have been identified in some of them, and gold at this date is restricted to sites with royal connections. The fortress reads as a royal trading place, with access to Anglo-Saxon England, Ireland, Atlantic Europe and the Mediterranean, and with a good anchorage. It was a place of feasting, gift-giving and redistribution. A Norse lead weight and an iron sword pommel come from the destruction of the rampart, which may belong to the siege of 780 or to the Viking siege of 870. The publication of the dig is dated 1990 and also 1991. A detailed record and finds catalogue was placed on microfiche, with a gazetteer of coastal and inland sites from 450 to 850, a note on how often B1 amphora sherds are recovered, and a discussion of the early medieval sculpture by John Higgitt. Later watching briefs inside the castle, at least twelve of them, have not produced early medieval deposits. Medieval objects from the same dig, including chainmail that can be dated to the Wars of Independence, remained largely unpublished. More than 300 objects were uncovered, together with the charred remains of the early fortress.

Fragments of two recumbent cross-slabs, grave covers of about 900 to 1100 and products of the Govan school of carving around the year 1000, were found in the garden behind the Governor’s House. The date of discovery is uncertain. They are carved in relief on one broad face, with a cross and panels of interlace. Such stones occur only at high-status sites. They are evidence for an early medieval chapel and burial ground, perhaps the chapel of Saint Patrick, and they show that an elite fort stood here again by about 1000, after the Viking destruction. Three decorated carved stones, weighing up to 183 kilograms and dating as far back as the tenth century, were brought back onto display by crane for the exhibition that opened in July 2025. A separate silver pendant cross, dated to the late thirteenth or the fourteenth century, was also found at the castle.

The rock became the focus of the earldom of Lennox, the lordship that succeeded the old kingdom in this district. During the reign of Alexander II, from 1214 to 1249, the castle was firmly established as a royal castle. In 1238 Alexander II excluded Dumbarton Castle from the earldom of Lennox when he granted that earldom to Maldoven, son of Alwin. Around 1100 the rock stood near the border between the Scottish kingdom and the Norwegian hegemony of Argyll and the Isles, which is why a strong fortress was needed. After the Norse defeat at the Battle of Largs in 1263, the MacDonald lords of the Isles held the west. The castle became a border post toward the highlands and a back door into the kingdom. In theory it ranked with Edinburgh and Stirling. It never received their level of spending, and kings rarely slept inside it. Even when they were nearby they often preferred a house in the burgh or a lordly house close by. Keepers held it for the crown. They kept up the fabric, maintained a small staff and garrison, sometimes mustered a larger force, and made ready for a royal visit. The keepership was a high office, at least a senior knight and sometimes a greater noble. The earls of Lennox had an ancestral claim to it. Often the keeper was absent and a constable or assistant had charge. The castle was also the seat of the sheriffdom. The province of Lennox, centred on the Vale of Leven, was reshaped in the nineteenth century as the county of Dumbartonshire.

The medieval castle was split into a nether bailey, fronted on the Clyde by a gatehouse hall, and an over bailey on the flat ground between and beneath the crags, ending at the Wallace Tower and the north entry. A fourteenth-century portcullis arch marked the division. Late inventories are hard to match to rooms, but there seem to have been three halls: one in the Clyde-side gatehouse, one the Windy Hall in the over bailey, and one on the first floor of the Wallace Tower. The gatehouse hall was the keeper’s domain. The tower hall likely housed the commander of the small garrison. By the later 1300s there were twin residences, the Wallace Tower by the north entry and the gatehouse hall on the south. The surviving medieval pieces are the base of the Wallace Tower, the portcullis arch, and what may be the foundations of the White Tower. A sixteenth-century guard house stands below the arch. Its south face carries a carved mask traditionally called Fause Menteith, the keeper who captured William Wallace. The portcullis arch is a tall pointed opening with a slot for the portcullis. It controlled movement between the baileys and also bridged the two peaks. An upper chamber would have held the winding gear and some lodging. The upper guard house began in the sixteenth century with two upper floors, now reduced to one. Oval gunports for small swivel guns covered the long stair. Two eighteenth-century windows sit in the south wall. The long stair in the rock cleft behind the Governor’s House is medieval in origin and now has modern steps.

Drawings of the 1670s by John Slezer show the lost medieval watergate, or gatehouse hall, standing forward of the south curtain, with a large round-headed gateway and the remains of twin drum towers, a composition compared with the forework of James IV at Stirling. It lies under the present Governor’s House. Slezer also shows a group of buildings behind that watergate. They may include the great hall extensively restored by James III in the 1460s, perhaps the same as the Red Hall of legend, with a chamber, kitchens and outbuildings. The chapel may have stood in this area too, later the site of a military hospital and the terraced garden.

In 1296 the castle held out for two months against the English after other castles had surrendered, and then it too fell. Sir John de Menteith, also Sir John Menteith of Ruskie and Knapdale, about 1275 to about 1329, was keeper by an appointment of Edward I. He is known for the capture of Sir William Wallace in 1305. Wallace, about 1270 to 23 August 1305, was a leader of the First War of Scottish Independence. With Andrew Moray he defeated an English army at the Battle of Stirling Bridge in September 1297. He was Guardian of Scotland until his defeat at the Battle of Falkirk in July 1298. In August 1305 he was captured at Robroyston, near Glasgow, and handed to Edward I, who had him hanged, drawn and quartered for high treason and for crimes against English civilians. It is believed that Menteith took him to Dumbarton on the way to London. It is also said that he may have been held overnight, and that the speed of his arrival in London for trial leaves time only for a very brief stay, if any. A late fifteenth-century poem, The Wallace, has him dwell two months in Dumbarton and found a house of stone on the rock, leaving men to build it to the height before he rode back to the border. Both traditions show how firmly his name stuck. The Wallace Tower was associated with him by the 1400s. The sword called his was kept and displayed at the castle until 1888, when it was moved to the Wallace Monument at Stirling. A house of the gate, domus porte, appears in works of 1329 to 1330 overseen by Robert Wallace, constable of the castle, and from its position it might be this tower. The tower was rebuilt into the 1610s. Its lower parts may preserve an older base, and that base has been called Wallace’s prison, though it is not known that he was ever imprisoned here. Plans of 1719 caption it Wall House Tower. A drawing by Paul Sandby of about 1750 shows its final form. Around 1794 it was largely removed, the north entry was blocked, a three-storey barrack rose on the site, and the five-gun Duke of York’s battery was built to the north. Only the ruined lower parts, the blocked gateway and the barbican remain.

Menteith later joined Robert the Bruce and received large grants in Knapdale and Kintyre. He is described as guardian of the earldom of Menteith while his great-nephew Alan II was a child. In 1308 he defected to Robert I and brought the castle back to Scottish control. Robert I, born 11 July 1274 and died 7 June 1329, was king from 1306. He had been Earl of Carrick, had taken part in Wallace’s campaign, and had been a Guardian in 1298 beside John Comyn of Badenoch and Bishop William Lamberton. He resigned in 1300. He submitted to Edward I in 1302. In February 1306 he was involved in Comyn’s murder, was excommunicated by Pope Clement V, and received absolution from Bishop Robert Wishart of Glasgow. He was crowned on 25 March 1306, was defeated at Methven, and from 1307 fought a guerrilla war, with a victory at Loudoun Hill. He held a parliament in 1309. Between 1310 and 1314 he took much of the kingdom, and at Bannockburn in 1314 he defeated a larger English army under Edward II. Berwick, the last English stronghold, fell in 1318. The Declaration of Arbroath was sent in 1320. The pope recognised him in 1324. The Treaty of Corbeil renewed the French alliance in 1326. The Treaty of Edinburgh–Northampton in 1328 ended Edward III’s claim to sovereignty. Dumbarton was one of the few castles not slighted at the end of his reign. It was repaired and refortified, and the work continued under his son. Its position kept a line to Ireland and the western isles. He is known to have stayed there. His retirement manor was at Cardross, about a mile up the Leven, close enough for a fast ride of perhaps fifteen minutes if he needed refuge. He died at that lost manor. His body was buried at Dunfermline Abbey, his heart at Melrose Abbey, and his internal organs were embalmed and placed in St Serf’s Church, Dumbarton. It is also said that his body was eviscerated and embalmed at Cardross, and that his entrails were buried in the old parish church of Cardross, now a ruin in Levengrove Park about 750 metres to the north-west, in sight of the castle.

David II was born on 5 March 1324 at Dunfermline Abbey, one of twin sons of Robert I and Elizabeth de Burgh. His mother died in 1327. On 17 July 1328, under the Treaty of Edinburgh–Northampton, he married Joan, daughter of Edward II and Isabella of France, at Berwick. He was four and she was seven. He became king on 7 June 1329, at five, and was crowned and anointed at Scone on 24 November 1331, the first Scottish monarch anointed at coronation. Thomas Randolph, Earl of Moray, was guardian until he died on 20 July 1332. Donald, Earl of Mar, was chosen on 2 August and died ten days later at Dupplin Moor. Edward Balliol, backed by Edward III, was crowned at Scone on 24 September 1332 and fled after the Battle of Annan in December. The Battle of Halidon Hill was fought on 19 July 1333. A Scottish army under Sir Archibald Douglas attacked an English army commanded by Edward III and was heavily defeated. The immediate English target had been Berwick, besieged from March. The Scots failed to draw the English off, then assaulted a prepared position. Longbowmen broke up the approach, the infantry fight was short, and the English pursuit ran for 8 miles, or 13 kilometres. Douglas and much of the senior nobility were killed. Berwick surrendered the next day. Balliol was restored, ceded large territories, and did homage. He was deposed again in 1334, restored in 1335 and deposed in 1336. The Hundred Years’ War, from 1337, gave David room to recover. The Second War of Scottish Independence is dated from 1332 to 1357.

Malcolm Fleming of Fulwood, governor of Dumbarton and earlier tutor to the young king, sheltered David II and Joan after Halidon Hill. He took them to France, with his daughter Evota Fleming as maid of honour. They reached Boulogne on 14 May 1334 and were received by Philip VI. Château Gaillard was given to David as a residence. He was at the bloodless meeting of the English and French armies at Buironfosse in October 1339, and in 1336 he led a raid on the Channel Islands severe enough that the royal militia of Jersey was created. The king and queen are said to have remained in France for eight years. David landed at Inverbervie on 2 June 1341 and took government at seventeen. Fleming had returned to Dumbarton and held it against an English siege. In doing so he also protected the seventeen-year-old Robert the Steward, later Robert II. For this service David created Fleming the first Earl of Wigtown, the first new Scottish earldom in more than a century. In 1346 David invaded England under the Auld Alliance, won an early success at Hexham, and was defeated at Neville’s Cross on 17 October. Two arrows wounded his face. Sir John de Coupland captured him. He was treated at Bamburgh and held in England for eleven years, in the Tower from January 1347, then at Windsor, Odiham and other houses, while Robert Stewart governed. The Treaty of Berwick on 3 October 1357 ended the war. The ransom was 100,000 merks. David used the money in ways that alienated his subjects. By 1363 the rest could not be raised. Parliament in 1364 rejected his offer to leave the crown to Lionel of Antwerp. He died childless on 22 February 1371 and Robert II succeeded. Fleming was still governor in 1361 when the Black Death again entered Scotland and a third of the castle garrison died. He died a year later. His nephew, Malcolm Fleming of Biggar, followed him as sheriff of Dunbartonshire and governor of the castle.

On 21 March 1425 James I imprisoned Murdoch Stewart, Duke of Albany, and his eldest son Alexander for treason. Doune and Falkland were taken. James Mor Stewart, called James the Fat, the youngest son, born about 1400, became a rallying point. He had the support of his mother’s people in Lennox and of Fionnlagh MacCailein, bishop of Argyll. He marched on Dumbarton, burned the town, and killed the keeper, Sir John Stewart of Dundonald, the king’s uncle. The castle, commanded by John Colquhoun, also named Sir John Colquhoun, held out. James I rewarded Colquhoun with the governorship, which he kept until his death in 1439. As many as 600 of Clan Galbraith, whose chief James Galbraith of Culcreuch had joined the revolt, fled to Kintyre and Gigha and took the name MacBhreatneaich. Murdoch and two sons were executed. James the Fat fled to Antrim later in 1425 and never returned. His death is given as 1429 and as 1449. A second attempt in 1429, a fleet sent to bring him home so that he might be king, failed because he died first. He had seven children by a woman named MacDonald and did not marry. His eldest son, James Beag, obtained a pardon and is the ancestor of the Stewarts of Ardvorlich. His mother, Isabella of Lennox, was held at Tantallon and released after James I was killed in 1437. She later raised the grandchildren at Inchmurrin on Loch Lomond.

From 1488 James IV used the castle and its anchorage against the lords of the Isles. James IV was born on 17 March 1473, became king on 11 June 1488 after his father James III died at Sauchieburn, and was killed at Flodden on 9 September 1513. He built up the royal navy, with two dockyards and 38 ships, including Great Michael. In October 1489 former supporters of James III, led by John Stewart, first Earl of Lennox, gathered at Dumbarton and hoped for help from Henry VII. James IV defeated them on 11 and 12 October in a battle between the Touch and Menteith hills near Stirling. In that same year 1489 the six-tonne cannon Mons Meg was dragged from Edinburgh Castle to Dumbarton as part of his effort to recover the castle after nobles had seized it. A cannonball of 150 kilograms, made to be fired from Mons Meg, is now displayed at the castle. James was at Dumbarton with the chancellor, Colin Campbell, first Earl of Argyll, in November 1489, and he used a ship of the laird of Luss. The next February a royal ship was chased by the English and lost some of her cables. In 1494 a row barge was built for the king with timber from Loch Lomond. In March 1495 he was given a camp bed for use at sea, and a boat carried cannon to the castle. Patrick Hepburn, first Earl of Bothwell, was made captain on 1 April 1495. A man played the clarsach for the king. In 1495 James sailed for Argyll from here against the MacDonalds. He was almost always lodged in the burgh or in a nearby house, and only visited the castle, which may mean it lacked comfortable royal rooms. On the day after his wedding to Margaret Tudor in 1503 he gave her the castle. Margaret Tudor’s marriage was part of the Treaty of Perpetual Peace of 1502, and it led, a century later, to the union of the crowns. In 1505 Dumbarton was his base for the western isles. One ship’s mast was made from timber at Drymen. On 5 June a French whistler, perhaps playing a recorder, entertained him. On 8 June he played cards with John Murray and Master Robert Cockburn, lost 4 pounds and 10 shillings, and later attended evensong in the parish kirk and college of Dumbarton. That year John Ramsay built him a ship called the Columb, after Saint Columba. In December 1505 a sword that had belonged to William Wallace was repaired.

On 18 May 1515 the James, or the Margaret, and six other ships brought John Stewart, Duke of Albany and regent, to Dumbarton. The ships were repaired in July and new docks were made. John Drummond of Milnab took fourteen of their guns to Glasgow. In September Albany held court and received Thomas Benolt, Clarenceux King of Arms. In March 1516 he issued six letters of remission to men who had held the castle for Lennox against the king in 1489. He sailed from Dumbarton to France on 31 May 1524. James V, born 10 April 1512, king from 9 September 1513 and crowned on 21 September 1513, was the son of James IV and Margaret Tudor. Regents governed his minority, first his mother and then Albany. His personal rule began in 1528 when he escaped Archibald Douglas, sixth Earl of Angus. In 1526 John Stewart, third Earl of Lennox, fortified Dumbarton against the Douglas faction who controlled the young king. Lennox was defeated by Angus at the Battle of Linlithgow Bridge. James Hamilton of Finnart, implicated in Lennox’s death, held the castle until 1531. Later James V used it as a prison for people convicted at the justice ayre, and in 1539 he received their fines there. In 1540 he circumnavigated Scotland from the Forth and arrived at Dumbarton with Cardinal Beaton, the Earl of Huntly and the Earl of Arran, each leading five hundred men. Cardinal Beaton is David Beaton, also spelled Beton or Bethune, about 1494 to 29 May 1546, Archbishop of St Andrews and the last Scottish cardinal before the Reformation. The voyage was later published, in 1583, by Nicolas de Nicolay, cosmographer to the king of France, with the first modern map of the Scottish coastline. James V died on 14 December 1542 after Solway Moss. His only surviving legitimate child, Mary, succeeded at six days old.

The Rough Wooing ran from December 1543 to March 1551. It is also called the Eight Years’ War. After the English Reformation, England attacked Scotland to break the Auld Alliance, to keep France from using Scotland as a springboard, to weaken the kingdom, and to force confirmation of a marriage between Mary and Prince Edward under the Treaty of Greenwich of July 1543. Henry VIII declared war to compel that marriage. Edward was six at the start of the war. After he became king in 1547 the war continued under the Duke of Somerset, and from 1549 under the Duke of Northumberland, who wanted a cheaper policy. It was the last major war between Scotland and England before the union of the crowns in 1603.

Matthew Stuart, Earl of Lennox, had been with the French party led by Mary of Guise and then turned toward England. In 1544 munitions and ten thousand French crowns of the sun arrived with Jacques de la Brosse and were secured by Lennox and the Earl of Glencairn. Lennox went to England and left the castle with William Stirling of Glorat. He signed a deal with Henry VIII offering Dumbarton and the Isle of Bute in return for land in England, marriage to Henry’s niece Margaret Douglas, and a future governorship of Scotland if events allowed. He undertook to keep the infant Mary from being taken out of Scotland. George Stirling of Glorat refused that policy, shut Lennox out, and held the castle in the young queen’s name only. The privy council agreed. Lennox had to sail for Ireland. More French troops still landed, under Gabriel de Montgomery, the soldier who later killed Henry II of France in a joust in 1559. In May 1545 Lennox tried to take the castle with soldiers commanded by his brother Robert Stewart, bishop of Caithness. In May 1546 he sailed from Chester with about twenty followers in the Katherine Goodman and a pinnace. Regent Arran besieged the castle with a larger force, borrowing the Earl of Argyll’s artillery and ordering Robert Hamilton of Briggis to bring guns from Dunbar. George Stirling surrendered after twenty days. John Lesley wrote that the captain and the bishop surrendered to Arran and were rewarded, after negotiation by the Earl of Huntly. The siege delayed Arran’s action at St Andrews Castle. In July Arran held court at Dumbarton and remitted the keeper. In March 1547 he acknowledged Stirling’s service in rendering the castle.

Mary, Queen of Scots was born on 8 December 1542 and was queen from 14 December 1542 until her abdication on 24 July 1567. She died on 8 February 1587. Her mother, Mary of Guise, followed Arran as regent. In 1548 Mary was betrothed to Francis, dauphin of France, and was sent to France to be safe from the English war. She was lodged at Dumbarton by 22 February 1548. Alexander Cunningham, fifth Earl of Glencairn, wrote to Mary of Guise from the castle that he had received a French cargo and that it would be as safe as if it were in Stirling. Annie Cameron edited the correspondence of Mary of Lorraine in which that letter sits. Annie Isabella Cameron, later Annie Dunlop, was born on 10 May 1897 and died on 23 March 1973. She was a Scottish historian, an editor and a university lecturer, and she was appointed OBE. The English commander Grey of Wilton proposed basing warships at Lamlash on Arran to watch for the French ships coming for Mary. Mary of Guise was at the castle in the first days of May 1548. One account has her spend six months there with her daughter, with a French guard, feeling safe, while enemies may have thought of taking the child and found the castle too strong. Another account has Mary kept for several months before an embarkation set for 13 July 1548 and delayed by weather until 7 August. The governor was James Fleming, fourth Lord Fleming, who went with the party. Four galleys are also said to have taken her. The fleet was under Nicolas de Villegagnon and Michel de Seure. Her governess Lady Fleming and the Four Marys sailed with her. They went round the west of Ireland to avoid English ships under Edward Clinton. In France she was soon betrothed to the young dauphin. She married Francis in 1558, was queen consort of France from his accession in 1559 until his death in December 1560, and returned to Scotland in August 1561. She sailed into Leith, not into the Clyde. Dumbarton’s days as the royal gateway were over. A rumour heard by Gilbert Kennedy, third Earl of Cassilis, said that in 1557 five hundred Gascon soldiers arrived at Dumbarton to serve on the borders for Mary of Guise.

Mary stayed at the castle in July 1563, during a progress through Lennox and Argyll, and dined on salmon, eggs and white wine. In 1565, during the Chaseabout Raid, her supporter John Colquhoun of Luss proclaimed at Rossdhu on 15 October that the people of Dumbarton should prepare to resist the Earl of Argyll at the Hill of Ardmore, and that the captain would keep ships in the Clyde to fire on the earl’s boats. The Battle of Langside was fought on 13 May 1568 between forces loyal to Mary and forces acting for her infant son James VI. After Carberry Hill she had been imprisoned in Lochleven, had abdicated, and had escaped in early May, heading west toward the Hamiltons and the safety of Dumbarton, meaning to restore her rights. She was defeated and went to England instead of reaching the castle. The battle is generally taken as the start of the Marian civil war. John Fleming, fifth Lord Fleming, keeper of the castle, went with her into England and was allowed to return. When William Kirkcaldy of Grange changed sides, the war deepened. The first siege of Dumbarton was lifted because Regent Moray was assassinated in January 1570. The assassin, James Hamilton of Bothwellhaugh, was welcomed at the castle. Fleming’s defence for Mary was helped by supply ships from France under his cousin Thomas Fleming. An attempt to ambush the English general William Drury in May 1570 failed and was mocked in a ballad, The tressoun of Dumbertane, printed by Robert Lekprevik and attributed to Robert Sempill. In October 1570 Fleming fortified the castle with stone taken by demolishing churches and houses in Dumbarton and Cardross. The castle was captured for the king’s party in the early morning of 1 April 1571, and also in the early hours of 2 April 1571. Thomas Crawford of Jordanhill led the escalade, with John Cunningham of Drumquhassle also named, and with about 100 men. They used ladders on the precipitous north-east side and surprised the garrison. John Hamilton, archbishop of St Andrews, was among the prisoners and was later executed. Lord Fleming escaped by sea and died a year later, accidentally wounded by his own side while supervising munitions at Edinburgh Castle.

The castle was a prison for Regent Morton in June 1581, before his execution in Edinburgh. On 8 September 1582 it was put in the keeping of William Stewart of Caverston, an ally of Esmé Stewart, first Duke of Lennox. Displaced by the Ruthven, or Gowrie, regime, Lennox went to the castle in secret, pretending to travel from Edinburgh to Dalkeith. He had a barque there. The English agent Robert Bowes expected him to sail for France well victualled. Others feared a French foothold. In December 1582 two Englishmen in his service left by his ship from Largs. Lennox himself went to France through England and did not return. In 1595 James VI made John Hamilton, first Marquis of Hamilton, captain. In January 1598 Hamilton had to give the office to Ludovic Stuart, second Duke of Lennox. The king dined at the castle on 24 August 1598 during a progress. By 1620 Sir John Stewart, an illegitimate son of that duke, was constable and keeper.

Few buildings of this period remain, but works are recorded in 1617, 1618 and 1628 to 1629. A new Wallace Tower replaced the medieval one. In June 1618 masons were on the upper storey and the tower was enlarged. It was finished outside with harling. A bell house stood on the south side. Women from the town carried lime and sand up the rock in bags. Women were employed to carry sand and lime from the boats to where men mixed mortar, probably because the paths were too steep and narrow for barrows. They were paid less than the men, and the work may still have paid better than farm work or textiles. Eight women are recorded in 1617, with Christene Buchanan as their leader and spokeswoman. Fourteen are listed in 1629 and eighteen in 1633. Janet Thome, Margaret Robisone and Margaret Paul worked there in 1629, and Margaret Paul again in 1633. One woman’s husband died in 1679, nearly fifty years after her work, and she herself had died in 1651. Such notices are rare in the royal building accounts. A gang of women carried stones in baskets on Inchkeith in 1555, another steep rock fortress. In England, women and girls carried sand and lime at Bolsover. Medieval English accounts only sometimes name women, mixing mortar or carrying water at Woodstock in 1271, or carrying straw and moss. By 1627 the keeper Sir John Stewart of Methven had neglected the fortress. Sir John Stewart of Traquair replaced him and recorded the poor state of the building. Surviving accounts mostly concern the artillery and the fore-yet wall, a defence on the south. In 1644 the Scottish parliament judged that the castle was likely to be more hurtful than useful to the country. William Middlemest, keeper in 1622, petitioned for better pay for the garrison. In November 1645 the Committee of Estates allowed the keeper John Semple to recruit thirty extra soldiers because the number of prisoners had risen. After Oliver Cromwell’s death in 1658 the strategic weight of the castle declined.

Inventories survive for 1510, 1571, 1580, 1644 and 1668. In 1510 the chapel of Saint Patrick held an old parchment mass book, a pewter chalice and liturgical cloths. The hall had four tables. Beside it was a chamber of dais, a solar, with a bed. The Wallace Tower had an iron yett and a draw bar, bedchambers, and a bell at the head of the tower. The Windy Hall held another bed. In August 1536 George Stirling of Glorat took delivery from John Drummond, the king’s master wright, of four great guns and six falcons on wheeled carriages, thirty-three bronze hagbuts, and four iron culverins, with ammunition, powder and ramrods. Drummond took away an old brass gun 10 feet, or 3 metres, long. A separate list notes cannon he transported to Dumbarton in 1536. In 1571 the armament included a gross culverin, two small batteris, and a French moyen on the walls, with another moyen fit for the field. Two Brittany falcons, a quarter falcon and a double barse were also there. Provisions included eleven hogsheads of biscuit. Some of the guns were later taken to the siege of Edinburgh Castle. The 1580 inventory is the list of munition and household gear left by John Cunningham of Drumquhassle and delivered on 27 August 1580 to William Stewart of Caverston for Esmé Stewart, earl of Lennox. There were six large cannon. The bed in the chamber of dais was now a stand bed of eastland timber, Baltic oak, with a roof and panel of the same. In 1644, when John Sempill became keeper, that chamber still had a bed, a chamber pot and a truckle bed, and also twelve ramrods, three worms for unloading guns, three hagbuts and an iron flail. The hall held twelve broken pikes, four of them without blades. The armoury held thirty-three corslets, 105 helmets and 43 swords.

In 1668 the governor Francis Montgomerie of Giffin recorded that the first floor of a lodging called the new chamber held a quantity of old rusty guns and swords, so rusted, broken and spoiled that they could never serve. The beds were insufficient. The top room held spoiled matches. The windows were broken. He worried about the water supply from the loch and from the low well. Francis Montgomerie of Giffen, the spelling also given as Giffin, was born in 1645 and died about 1728. He sat in the Parliament of Scotland from 1689 to 1707 and in the British House of Commons from 1707 to 1710. The list of governors places him in 1696. The 1668 inventory already uses his name and his title of governor.

After the Restoration in 1660 the castle joined a network of permanently garrisoned artillery forts. The standing garrison policed highland glens and rounded up offenders. Numbers rose and fell with money and with threat. The Covenanters’ rising of 1679 prompted a new south gateway and defences. Slezer may have drawn the medieval arrangement on the eve of that change. In 1681 the garrison stood at 35. After the revolution of 1689 it was raised to 60. From the exile of James VII and II, who reigned from 1685 to 1688, and through the Jacobite risings, Dumbarton was the fortress nearest the south-west highlands. By the end of the seventeenth century buildings, stores, munitions and guns were in a poor state. Even after the 1708 rising the castle was thought too ruinous to be an effective prison. The last time the guns were fired in anger before the Second World War was in September 1715, when a MacGregor Jacobite raid threatened the Vale of Leven. A salvo from the castle made the raiders retreat.

After the 1715 rising, General George Wade visited in 1724 and recommended a major upgrading. His plans for the chief Scottish castles were carried out in the 1730s. The north circuit was rebuilt in the late 1720s. The south and west defences followed in the 1730s. Captain John Romer, a military engineer to the Board of Ordnance who also designed much of the northern artillery front of Edinburgh Castle, directed the work. He regularised the ramparts with strong, angled, battered walls, enough for a limited artillery attack and not for a full siege. King George’s Battery, named for George II, is triangular, or V-shaped, and encloses the Governor’s House. A circular sentinel box, Romer’s signature, is corbelled over the southern angle, and another stands on the east curtain. The same boxes appear at Edinburgh. The inner gate of about 1735 is a classical round arch in ashlar, with a projecting central quoin, a corbelled pediment, and holes for great timber bars. The doorway of the Governor’s House mirrors it. The house, of 1735, was designed by Romer with William Adam as builder. It was built for John Kennedy, eighth Earl of Cassilis. It is a plain classical block of three storeys and an attic, in three bays. Raised margins show that it was meant to be harled. By the late 1800s it was used as a barracks. Most of what a visitor sees today is this Georgian artillery fort: musket loops, sentinel turrets, a blast-walled magazine, cannon, a barracks later used as a prison, and a house for the governor. The medieval remnants are easy to miss.

The Spanish Battery and the Bower Battery were built in 1735, covering the western approaches up the Clyde, and were rebuilt around 1802 for heavier guns. The powder magazine on the Beak, the only building still standing there, was erected around 1748 by William Skinner, chief engineer of North Britain, who also worked at Edinburgh and designed Fort George. It is a detached skew-gabled rectangle inside a plain blast wall, with double doors and indirect vents, built to resist solid shot, bombs and arson. It held 150 barrels of powder. An earlier magazine on the Beak has gone. A second was ordered about 1708 and is also lost. The French Prison, first called the Old Barracks, was built around the 1760s as a two-storey, five-bay block at the head of the cleft. A round window recalls Skinner’s ordnance stores at Fort George. Bars, extra bolts and, apparently, an iron-bound floor were added later to stop boards being lifted. There is no evidence that other French prisoners were kept in the castle. By the mid-1850s the ground floor held offices, ablutions and a cookhouse, and the first floor held barracks, including sergeants’ rooms. Numbers still painted on the doors probably date from the First World War. The buildings are rubble with ashlar dressings. Around 1794 to 1800, after war with revolutionary France, the Duke of York’s, Duke of Argyll’s and Prince of Wales’s batteries were built. A large new barracks, with cookhouse and ablutions, replaced the Wallace Tower in 1794. A master gunner’s quarters and armoury rose in the over bailey. A hospital stood just west of the Governor’s House. The last of the north gate was blocked and demolished. The Duke of Argyll’s battery replaced an older work on the north-east of the Beak. The Prince of Wales battery, near the 1748 magazine, had been called the Prince Regent’s battery. About 1850 a new outer wall and gate were built. The oldest battery is the one-gun battery of about 1550, which covered the old north entry and is now overshadowed by the Duke of York’s battery. The Spur battery, of about 1680, lies west of the Governor’s House, near a latrine that projects over the wall. A crane bastion at the south-east corner of the Beak survives in eighteenth-century form and may be older. The crane itself has gone. It lifted stores and munitions onto the Beak.

A covered reservoir, also called the well, stands near the site of an open pool that the repairs of 1688 call the loch, under the White Tower Crag and north of the lost master gunner’s house. The 1708 drawing shows it. It may be the only above-ground trace of the earliest occupation, and it may be the well that failed in the Viking siege.

The castle’s value as a prison rose once it was no longer the main gateway to France and Spain. Patrick Stewart, Earl of Orkney, described as proud, avaricious, cruel and dissipated, was arrested in 1609, moved from Edinburgh to Dumbarton in 1612, and lived there in relative comfort until 1614. He was tried in Edinburgh and executed for treason in February 1615. After Culloden, Jacobite prisoners were held here, local lairds and senior figures caught on the run. The most senior was William Murray, marquess of Tullibardine. Fifty-three were held and twelve escaped. In May 1746 two gentlemen escaped by a rope ladder smuggled in under a visiting sister’s skirts. Low-ranking men were likely kept in the lower vaults of the Wallace Tower, with little air and little food. Men of higher rank used the upper rooms. Aeneas MacDonald, one of the seven men of Moidart who came with Charles Edward Stuart in 1745, was among them. Sir James Campbell of Auchinbreck said the air of the place agreed with him and that he much preferred it to any other. He lived with his wife and three sons, saw friends and neighbours, and kept his own cook and four servants. In 1747 Jacobite prisoners held at the castle were recruited for service in south India. The understrength 74th Highlanders, home after seventeen years in India, recruited while based at Dumbarton, though it is not clear whether they were in the castle or in the town.

General Edouard Simon, a French general, was captured at Buçaco in Portugal in 1810, badly wounded. He was paroled in Hampshire, conspired with other officers to escape across the Channel with the help of English smugglers, and was also involved in passing intelligence for a French raid on the south coast. He reached London in early 1812 and was caught by Bow Street officers. Other prisoner-of-war prisons had opened in Scotland. Simon was treated as a special flight risk. The garrison was greatly enlarged for his arrival in March 1812. He and his servant were confined in the two-storey building now called the French Prison, in a suite with iron-barred windows, watched by two soldiers with loaded arms and fixed bayonets. He could walk to the top of the rock and back twice a day, from 10 in the morning until noon and from 4 until 6. He was released under the Treaty of Paris in May 1814 and returned to France. Dumbarton was considered as a prison for Napoleon after his capture in 1815 and was rejected as too contentious. After the Radical Rising of 1820 the castle held suspected radicals. Eight suspected leaders were taken in raids at Duntocher, where an attack on the castle was said to be planned. Other prisoners came from Greenock, after a crowd attacked volunteers who were escorting prisoners and freed them. All those held at the castle were acquitted for lack of evidence. Nine of them co-signed letters of thanks to the lieutenant governor, Major General Ilay Ferrier, for their treatment. The letters are dated June 1820, beside a petition of 14 April 1820.

General Francis Dundas, about 1759 to January 1824, was governor of the castle. The castle list dates his appointment to 30 January 1817. His own life dates it to 1819. He was the second son of Robert Dundas of Arniston the younger and a nephew of Henry Dundas. He was commissioned into the 1st Foot Guards in 1775, moved to the 45th Foot in 1783 and to the 1st Foot in 1787, and served in the American Revolutionary War under Cornwallis at the Battle of Clapp’s Mills, the Battle of Green Spring and the siege of Yorktown. In 1796 he commanded the Scots brigade, later the 94th Foot, encamped at West Barns. He was ordered to the Cape in August 1796, became major-general and commander of the forces in May 1797, and was acting governor of the Cape Colony from 21 November 1798 to 9 December 1799 and again from 20 April 1801 to 20 February 1803, when the colony was returned to the Batavian Republic under the Treaty of Amiens, signed on 27 March 1802. The Graaff Reinet revolt of 1798 and the Third Frontier War fell in his governorship. His administration was seen as autocratic and fair. He later commanded the Kent division during part of the invasion alarms of 1804 and 1805. He was promoted full general on 1 January 1812 and was colonel of the 71st Regiment from 1809. On 22 January 1800, in Cape Town, he married Eliza Cumming, daughter of Sir John Cumming. Their children included Francis, born in Cape Town on 16 January 1801, Robert, born at Berwick-upon-Tweed on 3 November 1805, and Caroline, born at Newcastle on 21 January 1807, besides Wedderburn, Henrietta and Alexander. He died at 11 Shandwick Place, just west of Princes Street in Edinburgh. The day is given as 4 January 1824 and as 15 January 1824. George Harris is listed as governor from 5 February 1824.

Soldiers earned a few pence by showing visitors round. Poets and painters came for the picturesque rock. Dorothy and William Wordsworth visited in 1803. They were told that a ruin on the highest eminence had been a windmill, and they were shown a trout, boxed in a well near the guard room, that had been there for thirty years. Samuel Taylor Coleridge was with them. Dorothy wrote that they came to the barracks and saw soldiers’ wives hanging linen on the rails while the wind beat about them, and she called the Governor’s House a modern white-washed house that jars, wherever it is seen, with the natural character of the place. James Boswell and Samuel Johnson came on their journey, and Johnson wrote the visit into his account of the western islands, published in 1775. Paul Sandby, chief draughtsman to the military survey, drew the north side from the burgh across the Leven around 1750 and published a print, and he also painted a wider oil of the same view. J. M. W. Turner made an engraving of a distant view around 1818 for his Liber Studiorum, and in the 1830s he sketched the castle again for an edition of Walter Scott’s poetry. An engraving of 1836 is by William Miller after Turner. Felix Mendelssohn visited and sketched in 1829. George Washington Wilson photographed the view from the south bank as early as the 1850s, and a print entered an album compiled for Prince Albert. On 17 August 1847 Queen Victoria and her family sailed down the Clyde on the royal steam-boat The Fairy. She wrote that the situation was very fine, the rock rising straight out of the river, with mountains all round and the town of Dumbarton behind it, and that it was very picturesque. Hope James Stewart painted the landing on the north side. Victoria made two sketches of the rock that year. She owned a watercolour of the castle by Edouard Hildebrandt, made in 1848. The castle also appears in Jane Porter’s novel The Scottish Chiefs, of 1810. Until 1919 the rock was the origin meridian for the six-inch and the 1:2500 maps of Dumbartonshire. After that those maps used the meridian of the church spire at Lanark.

The south approach was by water until the seventeenth century, and then by a road round the base, still difficult because of bog. The 1708 plan shows the watermark 35 metres out from the south curtain. Dumbarton Pier, finished in May 1875, ran 765 feet from the base of the rock. Its remains show on air photographs of the Second World War. The grass to the south became the Pier Park, and reclamation pushed the water farther off. Into the 1800s the castle stood about a kilometre from the burgh. Views from the town still exist, but streets now break the old visual link, and the reason the town grew here is harder to see. The north side, marsh and tide for millennia, was drained and given over to shipbuilding. After the war the Denny basin was filled, so the rock no longer seems almost surrounded by water.

By the early 1900s the military role had almost gone. Local feeling opposed dismantling. In 1907 the town council and the county council formed a committee on future uses. Ownership passed from the War Office to the Office of Works in 1909, for the purpose of maintaining the ancient fortress as a place of historic interest. It was the end of the castle as a working fort and the start of its life as an ancient monument. It returned briefly to military use in the First World War as a headquarters and depot. Work began to house 500 men of the 9th Battalion, the Argyll and Sutherland Highlanders, the local Territorial unit, and the reserve battalion is also given as the 3/9th. Seventeen wooden huts went up, including a sergeants’ mess, sleeping huts, ablutions, cookhouses and latrines. An acetylene lighting plant was installed. The Governor’s House became officers’ quarters, the hospital became battalion offices, and the armoury, the new barracks and the French Prison were gutted for sleeping. An old magazine, now demolished, became a detention room. Letters from Captain William Stavert Ferrie, 1889 to 1958, written from Dumbarton in 1915, suggest indifference to the garrison and a fatigue with the war. A fete in the summer of 1916, proposed in November 1915, supported wounded sailors and soldiers connected with the county, raised a substantial sum, and was also meant to renew interest in the castle. In 1925 the 9th Battalion took parts of the Governor’s House as an officers’ mess and headquarters.

Demolition to create an ancient monument began in 1923. The new barrack block came down, the master gunner’s quarters having already gone, and the hospital, the armoury, a second magazine and the wartime huts were removed. The loss of the north barracks revealed the ruins of the Wallace Tower and the old entry. The choice favoured the medieval ruins over the later military buildings and left the over bailey bleak and empty. At the outbreak of the Second World War the castle was taken back into military control. An anti-aircraft battery was installed on the Beak in 1940 to 1941, with at least one duty hut, and the French Prison was used for sleeping. In May 1941 German bombs aimed at the nearby Blackburn aircraft factory hit the castle. The Governor’s House was damaged, and a 70-foot, or 21-metre, length of wall on the east side was destroyed. The gun site was removed in 1945, and the Territorial unit took the Governor’s House again at about the same time. Titanium oxide on a later find has been linked, as one possibility, to smokescreens used when the castle was an anti-aircraft base.

Major-General Alexander Patrick Drummond Telfer-Smollett, born on 12 August 1884 and died in 1954, had been lieutenant governor of Guernsey from 1939 to 1940. He is listed as keeper of Dumbarton Castle from 4 July 1949. Brigadier Alastair Stevenson Pearson, known as Jock, was born on 1 June 1915 and died on 29 March 1996. He was a baker and a farmer, and he was one of the most highly regarded soldiers of the Parachute Regiment in the Second World War. He is listed as keeper from 12 June 1981. Brigadier Donald David Graeme Hardie, born on 23 January 1936, was Lord Lieutenant of Dunbartonshire from 1990 to 2007. He is an honorary vice-president of the Lennox and Argyll Battalion of the Boys’ Brigade. The castle list gives him as keeper from 10 September 1996, and his own notice still calls him Keeper of Dumbarton Castle. He was appointed a Commander of the Royal Victorian Order in 2008.

The castle was listed at category A in 1971 and scheduled in 1994, the designation dated 25 April 1994. In 2018 it was removed from the list of listed buildings under a dual-designation review. It remains a scheduled monument in state ownership, recognised as of national importance. The transfer into state care in 1909 was a transfer of ownership. Conservation since 2015 has included the outside of the Governor’s House, the grand magazine, power and dehumidification in the guard house, and rock anchoring where the cliffs are fracturing. Masonry work continues on King George’s Battery. Roof work on the French Prison is the first phase of a longer repair, and that interior is not open to the public. In 2024 and 2025 the ground floor of the Governor’s House was refurbished so that a new exhibition could show objects in stable conditions. The exhibition, called Rock of Ages, opened in July 2025. The public notice of the opening is dated 1 July 2025.

The exhibition includes objects from the 1970s excavation and pieces that had not been shown before. A pottery jug fragment of about 400 to 600 comes from a vessel of the early stronghold. A Viking sword pommel about a thousand years old may have come from the siege of 870. Iron arrowheads of about 1300 belong to the Wars of Independence. Silver coins are associated with the reign of Edward I for the years 1296 to 1305 and with the reign of Edward II for the years 1307 to 1327. Glass beads, worn as jewellery by men and women of Alt Clut, glass fragments more than 1,500 years old, and counters from board games are also shown. Pottery fragments come from vessels that carried wine and perhaps olive oil, evidence of links with continental and Mediterranean Europe. A replica of a toucan embroidery by Mary, Queen of Scots, is included. It stands for one of 37 needlework panels she made during her imprisonment in England before her execution in 1587. The panel itself recalls her shelter at the castle as a child in 1548, before she boarded a ship for France. An early nineteenth-century jewellery box, decorated with twists of paper, is thought to have been made by a French prisoner held during the Napoleonic wars. That thought sits beside the finding that no French prisoner other than General Simon is evidenced in the castle. A virtual tour in the same rooms shows the top of the rock and the view over the Clyde for visitors who cannot climb.

A small ceramic cross, now in that exhibition, was found in 1995 during utility works in the gardens east of the Governor’s House. Those gardens were heavily landscaped in the eighteenth century, so the cross has no archaeological context. From its form and its crude making it was thought to be early medieval, which would fit a Christian site already suggested by the grave slabs nearby. It measures 5.5 by 4 centimetres. Under a microscope the front left arm is chipped, which exposes the interior. The front is black and slightly reflective, perhaps a glaze. The back carries traces of a white material, at first thought to be salt crystallised after burial. Portable X-ray fluorescence showed a ceramic. The black surface is higher in calcium, sulphur and phosphorus than the broken interior, a combination that can come from ash or charcoal and may be residue from firing. The instrument reads a circle about 8 millimetres across, too wide to isolate the tiny white traces, so those traces were examined in a scanning electron microscope. The cross is large for that instrument. It could not be taped down or coated with carbon or gold, so it sat in a foam cradle and was studied in a low vacuum. The broken interior looks unconsolidated, which means the clay was only lightly fired. A harder firing would look glassy. The black surface is smooth, cracked as if heated or dried, and rich in carbon, which supports ash or charcoal. The white crystals are predominantly titanium oxide, a pigment in white paint. It was patented in the early 1800s and widely used from the 1920s, when painters looked for an alternative to lead. That finding may mean the cross is more modern than it seemed. It may instead have been found, painted and buried again. The titanium may have come from fertiliser, or from smokescreens used in the anti-aircraft role of the Second World War. The tests do not decide among those possibilities.

In a usual year the castle receives more than 25,000 visitors. The count for 2019 to 2020, before the closures of the epidemic, was 27,914. The count for 2023 to 2024, the first continuously open year after those closures and after further closures for repairs and bad weather, was 26,119. A survey of 68 visitors in 2023 found that 56 per cent had come specifically to see the castle, 28 per cent were doing several things in the area including the castle, 12 per cent had come on impulse, and 4 per cent did not answer. Visitors praise the staff, the panels and the views, and they complain of closed buildings, of the number of steps, and of unexpected closure. Scaffolding against rockfall has marked the entrance. There are 627 steps to the summit of White Tower Crag. From the car park, a short sloping path and 40 steps lead to King George’s Battery and the Governor’s House, and the first 14 of those steps have a handrail. The site is large, steep and rocky. The Spur, Spanish and Bower batteries lie along a narrow path of stone slabs with loose gravel, 80 steps, ending in a dead end. The guard house and the portcullis arch are reached by a very long, steep stair between the peaks. The White Tower route is exposed and can be extremely windy. Other batteries are reached by gravel paths or by further steep steps. The rock is also a home of Scottish bouldering and a lowland training ground for climbers. Up on the summit the view runs to the Rhins of Cowal, to Ben Lomond, east toward Glasgow, to the Campsie Fells, and on a clear day to the spire of Paisley Abbey.

The buried ground still matters. The 1970s trenches showed that pockets of early deposit survive despite centuries of rebuilding. The north entrance, the over bailey, the White Tower Crag, the footprint of the Wallace Tower, and the governor’s garden, where chapel and cemetery may lie, are the places most likely to hold what the standing walls no longer show. The Viking camp of 870, if it can be found, is more likely north of the rock or under the ground of the stadium, because the topography leaves little other room. What stands in the open air is mostly the artillery fort of the eighteenth century, wrapped around a medieval gate and the stump of a tower, on a rock whose recorded strength runs back to a letter of the fifth century.

Canonical page: https://getsitesee.com/places/dumbarton-castle