Beaumaris Castle

Beaumaris Castle: The Most Perfect Fortress Never Finished, on the Isle of Anglesey

In 1295, Master James of St George began designing the most geometrically perfect concentric castle in the history of medieval military architecture. The inner ward was rectangular, with six massive towers and two great D-shaped gatehouses arranged in perfect symmetry. The outer ward was octagonal, with twelve towers and two further gatehouses. A water-filled moat, 18 feet wide, surrounded everything.

There were 300 archer firing positions. One of the gatehouses had a tidal dock capable of receiving 40-ton vessels — the castle could be resupplied from the sea even under siege. And then Edward I ran out of money. The funds were diverted to his wars in Scotland. Over £15,000 had been spent. The walls reached only half their intended height. The towers were never completed. The gatehouses were never finished.

Beaumaris Castle on the Isle of Anglesey is, as historian Arnold Taylor put it, Britain's "most perfect example of symmetrical concentric planning" — and it has never been finished. It is the fourth and last of the UNESCO World Heritage Sites in Edward I's Iron Ring of North Wales castles (with Conwy, Caernarfon and Harlech), designated in 1986.

The paradox of the most perfect castle and the most incomplete castle being the same building is the defining quality of Beaumaris, and it gives the ruin a character quite different from the others. This guide covers everything you need to plan your visit.

Where Is Beaumaris Castle?

Beaumaris Castle is in the town of Beaumaris, on the south-eastern coast of the Isle of Anglesey, approximately 9 miles (15 kilometres) from Bangor via the A545. From Bangor by car, allow around 15 minutes. Bus routes 53, 57 and 58 stop 100 metres from the castle. The nearest railway station is Bangor, on the Crewe–Holyhead line. Parking is available near the castle green, with fees applicable.

A Brief History of Beaumaris Castle

Construction of Beaumaris Castle began in 1295, triggered by the Welsh uprising of Madog ap Llywelyn in 1294–95 which demonstrated that the existing chain of English fortresses in north Wales had gaps. The site at Llanfaes on Anglesey was chosen for its strategic command of the Menai Strait — the most important waterway separating the island from the mainland. The native Welsh population of Llanfaes was forcibly relocated to the new settlement of Newborough to clear the site. Over 2,600 workers were employed in the first years of construction.

By 1298, the Scottish wars drew Edward I's financial resources away from Wales. Construction slowed dramatically and eventually stopped. It resumed briefly in 1306 following a Welsh invasion scare, then ceased again around 1330. Edward I never saw his perfect castle completed. The gatehouse towers never reached their intended height. The inner ward walls remain lower than designed. The great gatehouses were never finished.

The castle saw military use despite its incomplete state. During the Owain Glyndŵr rebellion, Welsh forces captured it in 1403 and held it until 1405. In the Civil War, the Bulkeley family held it for the Royalists until it surrendered to Parliamentary forces in 1646. It was briefly reoccupied in 1648, then fell into ruin. It was acquired by Thomas Bulkeley for £735 in 1807 and restored in 1925. Cadw has managed it since its UNESCO designation in 1986.

The remarkable thing about Beaumaris is not its history of sieges and conflicts but the completeness of its unfinished ambition. The design was so thoroughly worked out — the concentric rings, the archer positions, the tidal dock, the moat — that even in its incomplete state it remains the clearest expression of what medieval military architects were trying to achieve. The castle never reached its intended height, yet it is more legible as a piece of design than almost any completed castle in Britain.

Architecture & Design

Beaumaris's concentric plan is the purest realisation of the form. The inner ward is a perfect rectangle with six towers at the corners and mid-points of the walls, and two enormous D-shaped gatehouses to the north and south — each designed to house a complete royal household, with the south gatehouse (the principal entrance) including accommodation for the king, queen and Prince of Wales.

The outer ward is octagonal, with its own twelve towers and two subsidiary gatehouses. The whole is surrounded by an 18-foot-wide water-filled moat. Walls reach up to 36 feet high and 15.5 feet thick.

The Gate next to Sea in the southern outer ward is one of the most technically interesting features: a dock connected directly to the tidal waters of the Menai Strait, designed to receive resupply vessels of up to 40 tons even during a siege — a refinement of the sea-gate concept that Harlech employed with its water gate and steps.

The 300 archer positions (164 functioning arrow slits, the remainder blocked when funds ran out) give a sense of the castle's defensive firepower at full strength. The castle's chapel, with its vaulted ceiling and pointed windows, survives in the inner ward.

Built from local limestone, sandstone and schist, the walls retain their grey-silver character against the backdrop of the Menai Strait and the Snowdonia peaks visible across the water.

Legends & Lore

Beaumaris carries a particular weight of reported paranormal activity, concentrated most heavily in the chapel, where visitors have described unexplained sounds — chanting and distressed calls — which local tradition attributes to the ghosts of the stonemasons who laboured on the castle, or the monks whose world was displaced to build it. An unsettling sense of being observed has been noted repeatedly in the corridors.

The most historically grounded ghost is that of William Davies — a Welsh Catholic priest imprisoned in the castle's dungeon in 1592 and executed in 1593 for his faith during the Elizabethan religious settlement. His imprisonment and execution are matters of historical record; the tradition that his presence remains in the castle is told as folklore.

Local tradition also preserves a mason's curse: a worker, overworked and unpaid during the rushed early construction, is said to have collapsed near the half-built gatehouse and proclaimed that no king would find peace within the walls and that the castle would always fall short. The curse is unverifiable and unrecorded, but the castle's unfinished state gives it an enduring irony.

Visiting the Castle

Beaumaris Castle is managed by Cadw and is open year-round, with longer hours in summer and shorter in winter. Cadw members enter free.

The visit is self-guided. An on-site exhibition covers Edward I's castle-building programme across North Wales. The wall walks offer exceptional views across the Menai Strait to the Snowdonia mountains — among the finest views from any castle in Wales. The tidal dock in the south outer ward is visible and worth seeking out. The chapel in the inner ward retains its architectural character. The D-shaped gatehouses — the castle's most ambitious unfinished elements — are impressive even at partial height.

There is no café at Beaumaris Castle. Picnic tables are provided; visitors are welcome to bring their own food. Beaumaris town, steps away, has cafés and restaurants. Photography for personal use is permitted throughout.

Dogs on short leads are welcome on the ground floor.

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For current opening hours and prices, check the official Cadw website before your visit.

Where to Stay Near Beaumaris Castle

Beaumaris town has a selection of hotels and guesthouses close to the castle. Bangor, 9 miles away on the mainland, offers a wider range. Anglesey has excellent coastal accommodation — the island's AONB coastline makes it a destination in its own right.

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The Best Time to Visit

Spring (April to June) is particularly beautiful at Beaumaris — the Menai Strait views are clear, the castle grounds are green and visitor numbers are lower than in summer. The view of Beaumaris from the water gate end, with Snowdonia behind, is finest in clear weather.

Summer (July to August) brings the longest hours and the best conditions for boat trips from the pier to Puffin Island. Autumn (September to October) is quieter with excellent light for photography.

How to Get There

By car. From Bangor, take the A5 across the Menai Suspension Bridge to Anglesey, then the A545 to Beaumaris — around 15 minutes. Parking is available near the castle.

By bus. Routes 53, 57 and 58 serve Beaumaris and stop 100 metres from the castle. Services connect to Bangor.

By train. Bangor station (9 miles) is the nearest rail connection, with services from Chester (around 1 hour) and Holyhead.

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Nearby Attractions

Beaumaris is on Anglesey — one of Wales's most rewarding islands for heritage and landscape.

Attraction	Why Visit	Distance
Beaumaris Town	A handsome Georgian town with colourful buildings, cafés and a pleasant seafront — the best-preserved Victorian resort town on Anglesey	Adjacent
Beaumaris Gaol	A Victorian prison built partly from stone taken from the castle — its grim history and reported hauntings make it a remarkable companion visit	~0.3 miles
Puffin Island Boat Trips	Boat trips from Beaumaris Pier to the seabird colony at Puffin Island — puffins, guillemots and seals	~0.5 miles
Penmon Priory	A 12th-century Augustinian priory at the eastern tip of Anglesey, with a medieval dovecote and views to Puffin Island — free to visit	~4 miles
Caernarfon Castle (Cadw, UNESCO)	The capital of Edward I's Iron Ring — the other great incomplete castle of the Iron Ring, visible across the Menai Strait	~14 miles

A natural Anglesey day pairs Beaumaris Castle with Beaumaris Gaol in the morning, then a Puffin Island boat trip in the afternoon — three very different aspects of the island's history in one visit.

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Family & Accessibility

Families. Beaumaris is excellent for families. The compact scale, the wall walks with Strait views, the tidal dock and the ghost traditions all engage children well. Dogs on short leads are welcome on the ground floor. Picnic tables make a packed lunch a natural choice.

Accessibility. The castle terrain is relatively easy compared to steeper sites, with a portable induction loop available. Some areas involve uneven surfaces and steps. Check the Cadw accessibility guide for detailed information. Only assistance dogs are permitted on the upper levels.

Practical Tips

• Wear comfortable walking shoes — the wall walks involve steps and uneven medieval stone surfaces.
• Pack a compact travel umbrella; Anglesey weather is changeable and the castle is exposed.
• Bring a portable power bank for photography — the Menai Strait views and the Snowdonia backdrop are exceptional.
• No café on site — bring a picnic (tables provided) or plan to eat in Beaumaris town before or after.
• Combine with Beaumaris Gaol — built from the castle's own stone, the two together tell the full story of the town's history.
• Photography for personal use is permitted throughout.
• Overseas visitor? Pack a UK travel adapter for Type G plugs.

Conclusion

The most perfectly designed medieval castle in Europe was never finished. Edward I spent £15,000 on it, employed 2,600 workers, and then diverted the funds to Scotland. The walls stopped halfway up. The towers never reached their intended height. The great gatehouses stand incomplete.

And yet the design is so precisely worked out — the concentric rings, the 300 archer positions, the tidal dock, the moat — that the ruin is more legible as a piece of military architecture than almost any complete castle in Britain. Beaumaris is the last of Edward I's Iron Ring. It is the most admired. It is the only one that fell short by design. The mason may have had a point.

Frequently Asked Questions

What are the opening hours of Beaumaris Castle?

The castle is open year-round, with longer hours in summer (broadly April to October) and shorter hours in winter. Check the official Cadw website for current times.

How much does it cost to visit Beaumaris Castle?

Admission fees vary by age; Cadw members enter free. Check the Cadw website for current prices and any online booking options.

Why was Beaumaris Castle never finished?

Construction began in 1295 under Master James of St George. Edward I diverted funds to his Scottish wars in 1298 before the castle could be completed. Work resumed briefly in 1306 but stopped around 1330. The walls never reached their intended height and the gatehouses were never completed. Over £15,000 was spent — yet it remained unfinished.

Is Beaumaris Castle a UNESCO World Heritage Site?

Yes — it is part of "Castles and Town Walls of King Edward in Gwynedd," designated in 1986, alongside Caernarfon, Conwy and Harlech castles.

Is there a café at Beaumaris Castle?

No — there is no café on site. Picnic tables are provided for visitors who bring their own food. Beaumaris town, immediately adjacent to the castle, has cafés and restaurants.

Are dogs allowed at Beaumaris Castle?

Dogs on short leads are welcome on the ground floor. Only assistance dogs are permitted on the upper levels.

Is Beaumaris Castle wheelchair accessible?

The castle terrain is relatively easy, with a portable induction loop available. Some areas involve uneven surfaces and steps. Check the Cadw accessibility guide for detailed information.

What is the tidal dock at Beaumaris Castle?

The Gate next to Sea in the outer ward contained a tidal dock capable of receiving vessels of up to 40 tons, allowing the castle to be resupplied from the Menai Strait by ship even during a siege — a pioneering feature of medieval military engineering.

How do I get to Beaumaris Castle?

By car, take the A5 across the Menai Suspension Bridge to Anglesey, then the A545 to Beaumaris — around 15 minutes from Bangor. Bus routes 53, 57 and 58 serve Beaumaris. Bangor station (9 miles) is the nearest rail connection.

Can I take photos at Beaumaris Castle?

Photography for personal use is permitted throughout the castle. Commercial photography requires Cadw's permission.