Clan Rising
Beaumaris Castle today

Wales · Partial ruin

Beaumaris Castle

Castell Biwmares

Beaumaris Castle is a late 13th–early 14th century concentric castle on Anglesey, Wales, begun under Edward I and designed by James of St George. It consists of an outer moated ward with multiple towers and gatehouses surrounding a larger inner ward intended to contain domestic ranges; the site later fell into ruin and is now a maintained historic monument and tourist attraction.

Photograph via Wikimedia Commons

First raised

1295

Its prime

1330

Today

Partial ruin

As it stood in 1330

What Beaumaris Castle looked like in its prime.

Beaumaris is a near-rectangular concentric fortress of pale grey local stone set inside a water-filled moat. An outer ward of continuous curtain wall is punctuated by twelve round towers and two outer gatehouses; an inner ward with higher walls contains six massive towers and two large D-shaped gatehouses. The centre is a broad, grassy inner bailey where ranges of domestic buildings stood. The plan is highly symmetrical and the moat is directly adjacent to the southern gate.

Its story

The story of Beaumaris Castle.

From the Statute of Rhuddlan to Beaumaris, 1284–1295

Edward I invaded North Wales in 1282 and decided to colonise it permanently. The Statute of Rhuddlan of 3 March 1284 carved three shires out of the north-west — Caernarfon, Merioneth and Anglesey — each governed from a new town beneath a new castle. Anglesey's was probably planned near Llanfaes, the wealthiest and most populous borough in Wales and a port on the preferred route to Ireland. The cost of the castles already rising at Caernarfon, Harlech and Conwy postponed the plan.

A rebellion revived it. Madog ap Llywelyn rose against English rule in 1294, and among the casualties was Roger de Pulesdon, sheriff of Anglesey. With the island reoccupied in April 1295, Edward revived the shelved scheme. The new site, a mile from Llanfaes, was called Beaumaris, “fair marsh”, from the Norman-French Beau Mareys; the Welsh population of Llanfaes was moved some twelve miles south-west to a new settlement named Newborough, clearing the ground for an English town under a new castle.

Master James of St George and the Leather Tokens

Work began in the summer of 1295 under Master James of St George, the king's master of works in Wales, for whom Beaumaris was now the main charge. The pipe rolls record that first summer in detail: an average of 1,800 workmen, 450 stonemasons and 375 quarriers on site, at around £270 a week in wages. The project fell into arrears so fast that officials issued leather tokens instead of coin, and the centre of the castle filled with huts to house the workforce through the winter.

The following spring James spelled out the costs to his employers. He had needed, and would go on needing, “400 masons, both cutters and layers, together with 2,000 less skilled workmen, 100 carts, 60 wagons and 30 boats bringing stone and sea coal; 200 quarrymen; 30 smiths”. The men's pay, he added, “has been and still is very much in arrears, and we are having the greatest difficulty in keeping them because they have simply nothing to live on.”

£15,000 Spent, the Walls Still Short

Building slowed through 1296 as debts mounted and stopped entirely by 1300, about £11,000 in, Edward's new wars in Scotland having taken his attention and money. The inner walls and towers stood at a fraction of their proper height, and the north and north-west sides had no outer defences. A feared Scottish invasion brought the masons back in 1306, first under James and then, after his death in 1309, under Master Nicolas de Derneford. Work halted for good in 1330, still short of the intended height, with £15,000 spent. A royal survey in 1343 reckoned at least £684 more was needed to finish it; the money was never invested.

The outer gate was set out of line with the inner, so an intruder who forced the first had to cross open ground on a predictable rightward path under fire. Arnold Taylor called Beaumaris Britain's “most perfect example of symmetrical concentric planning”, and for many years it was thought the pinnacle of military engineering in Edward I's reign — a reading historians now dispute, holding it as much a royal palace and symbol of English power as a fortification.

Taken by Glyndŵr's Rebels, 1403

A revolt against English rule broke out in North Wales in 1400 under Owain Glyndŵr. Rebels besieged and took Beaumaris in 1403; royal forces retook it in 1405. Neglect did the rest: by 1534, when Roland de Velville was constable, rain leaked into most of the rooms, and a report of 1539 counted an arsenal of eight or ten small guns and forty bows, which the new constable Richard Bulkeley thought quite inadequate against a Scottish attack. By 1609 Beaumaris was classed as “utterlie decayed”.

Surrendered Twice for Charles I, 1646 and 1648

War made the decayed castle useful again: it controlled part of the route between Charles I's Irish bases and his English operations. Thomas Bulkeley, whose family had managed the castle for centuries, held it for the king and may have spent around £3,000 on its defences. With the royal armies beaten, Colonel Richard Bulkeley surrendered in June 1646; Anglesey revolted again in 1648 and royalists briefly reoccupied the castle, giving it up a second time that October.

Parliament, fearing a royalist invasion from Scotland, spared Beaumaris the slighting inflicted elsewhere and garrisoned it under Colonel John Jones at £1,703 a year. When Charles II restored the Bulkeleys as constables in 1660 it appears to have been stripped of its lead and roofs. Thomas Bulkeley, 7th Viscount Bulkeley, bought the ruin from the Crown in 1807 for £735 and folded it into the park at Baron Hill. In 1925 it went into the care of the Commissioners of Works, who dug out the moat and repaired the stonework.

Step inside

9 places to explore in 1330.

The record describes 9 distinct spots at Beaumaris Castle, including 1 interior: domestic ranges (inner ward, interior remains). Create your own photoreal reconstruction and explore every one, more scenes means more rooms, more angles, and more of the place to stand in.

South gate approach and bridgeOuter moat and outer ward towersOuter gatehouse (front exterior)Inner ward (central bailey)Inner south D-shaped gatehouse (exterior)Inner north D-shaped gatehouse (exterior)Curtain walk and battlements (on the walls)Domestic ranges (inner ward, interior remains)South sea-landing and supply approach

Build Your Own Castle

Recreate Beaumaris Castle with AI to explore it.

The artist rebuilds it as it stood in 1330, a photoreal reconstruction that belongs to you alone. Pay with coins, no subscription needed.

Recreate this castle →

Castle Siege

Play Castle Siege at Beaumaris Castle.

A strategy game played on Beaumaris Castle’s real ground plan: the same surveyed walls shown in the archive below. Post your finite garrison on the battlements between assaults, then hold out as rams, siege towers, trebuchets and sappers arrive in ever-worse waves.

Sign in free to see the garrison muster. One castle costs 150 Clan Coins and is yours forever.

Sign in to take command →

See every castle’s leaderboard →

Whose castle

Clans who held Beaumaris Castle.

The families that held Beaumaris Castle for a decade or more across its history, follow a name to its clan.

  • Bulkeley

    Held for the Crown by the Bulkeley family, hereditary constables; bought outright by the 7th Viscount Bulkeley in 1807.

From the archive

Beaumaris Castle on paper: the measured plan and period views.

The survey plan and photographs below are the ground truth this page's reconstructions are checked against, drawn and photographed while the castle was still a working garrison. Every image is public-domain or openly licensed, with its source named.

Beaumaris Bay, Beaumaris Castle, Wales LOC 3751652297, Beaumaris Castle

Beaumaris Bay, Beaumaris Castle, Wales LOC 3751652297

ca. 1890-1900 · Photochrom Prints Collection (via Wikimedia Commons)

Public domain

Ground Plan. Beaumaris Castle., Beaumaris Castle

Ground Plan. Beaumaris Castle.

1884 · G. T. Clark, Mediaeval Military Architecture, vol. 1 (1884)

Public domain

Questions about Beaumaris Castle

What is the history of Beaumaris Castle?

Beaumaris Castle was begun in the late 13th century as part of Edward I’s campaign to conquer and control North Wales. Construction started in 1295 after the uprising of Madog ap Llywelyn, under a symmetrical design by James of St George. Funding for wars in Scotland interrupted the work, which finally stopped around 1330, leaving the castle incomplete. It was captured in 1403 and retaken in 1405.

What is inside Beaumaris Castle?

Inside Beaumaris Castle are the inner and outer wards, a broad grassy inner bailey and the remains of domestic ranges. The inner ward contains first-floor passageways, fireplaces and a chapel built into one of the towers. The planned accommodation included large halls, sleeping chambers, guardrooms and latrines, although the castle was never fully completed.

Who owns Beaumaris Castle now?

Beaumaris Castle is owned by Edward I of England. Cadw operates the castle, which is also designated a Grade I listed building and a scheduled monument. It has formed part of a UNESCO World Heritage Site since 1986.

Why was Beaumaris Castle built, and what was it used for?

Beaumaris Castle was built to fortify the area after the uprising of Madog ap Llywelyn and to support Edward I’s conquest and control of North Wales. Its inner ward was also intended to contain domestic buildings and accommodation for two substantial households. The south gate and tidal dock allowed the fortress to receive supplies directly by sea.

Where is Beaumaris Castle?

Beaumaris Castle is in Beaumaris, on Anglesey. It stands in Wales, on the island’s coast, about 1 mile from Llanfaes. The castle was built at around sea-level on the local coastline.

Was Beaumaris Castle ever attacked or besieged?

Beaumaris Castle was attacked and captured by Owain Glyndŵr’s Welsh forces in 1403, then retaken by royal forces in 1405. During the English Civil War it was held for Charles I and surrendered to Parliament in June 1646. Royalist forces briefly reoccupied it in 1648 before surrendering again in October.

Which family or clan held Beaumaris Castle?

The Bulkeley family held Beaumaris Castle for the Crown as hereditary constables. The 7th Viscount Bulkeley bought it outright in 1807. The family had been involved in the management of the castle for several centuries.

What did Beaumaris Castle look like in its prime?

Beaumaris Castle is a near-rectangular concentric fortress of pale grey local stone, set inside a water-filled moat. Its outer ward has twelve round towers and two gatehouses, while the higher inner ward has six massive towers and two large D-shaped gatehouses. The plan is highly symmetrical, with a broad grassy inner bailey at its centre.

Is Beaumaris Castle still standing, or is it a ruin?

Beaumaris Castle is still standing as a partial ruin. It was never fully built, and construction stopped around 1330 with the castle below its intended height. The ruined castle later fell into disrepair, but restoration work in the 20th century included clearing vegetation, digging out the moat and repairing the stonework.

Who built Beaumaris Castle?

Beaumaris Castle was begun under Edward I and designed by James of St George. James directed the substantial workforce employed during the initial years, and construction began in 1295 after the Madog ap Llywelyn uprising. The design was a symmetrical concentric plan.

When was Beaumaris Castle built?

Beaumaris Castle was built in the late 13th century, with construction beginning in 1295. Work continued in phases after interruptions caused by Edward I’s wars in Scotland, but finally stopped around 1330. The castle remained incomplete.

Can you visit Beaumaris Castle?

Beaumaris Castle can be visited as a tourist attraction. In the 21st century it is managed by Cadw, the Welsh agency for historic monuments. It is a ruined historic monument and part of the Castles and Town Walls of King Edward in Gwynedd World Heritage Site.
All castles of Wales · Castles of Europe · the best castles in Europe · explore the finished reconstructions.