Conwy Castle: A Welsh Stronghold of Stone, Strategy, and Siege

Written by Simon Willliams

Conwy Castle rears above the mouth of the River Conwy like a monarch surveying his realm, its eight great drum towers and soaring curtain walls drawn taut across a rocky spur that thrusts into the estuary. Begun in 1283 by Edward I, scarcely months after the death of Llywelyn ap Gruffudd had broken the last independent principality of Wales, this is one of the most complete and formidable fortresses ever raised in these islands. It is not merely a castle; it is a declaration of conquest made permanent, a masterpiece of military engineering that still commands the landscape with quiet, unanswerable authority.

The Hour of Triumph

The campaign of 1282-83 had been swift and ruthless. Llywelyn fell at Orewin Bridge in December; his brother Dafydd was hunted down and executed the following summer. Edward, determined that Gwynedd should never rise again, advanced along the north coast with meticulous supply lines and overwhelming force. At Conwy he found the ideal site: a rocky promontory flanked by sea and river, commanding the vital crossing into the heart of Snowdonia and the fertile vale beyond. The old Welsh llys of Llywelyn was swept aside; in its place the king ordered a new castle and walled town to rise together, twin instruments of domination.

Master James of St George, the Savoyard engineer whose genius shaped the Iron Ring, began work in the spring of 1283. The pace was ferocious: by the end of 1284 the circuit was defensible; within four years the walls and eight towers stood complete. Conwy was designed as a concentric fortress, yet its plan is unusually elegant -- roughly quadrangular, with four great towers at the angles and four intermediate mural towers, all linked by high curtain walls that follow the natural contours of the rock. The masonry, of local limestone and sandstone, rises in places to forty feet; the towers, each some sixty feet high, project boldly to enfilade every approach.

Strategy in Stone

What sets Conwy apart is the seamless integration of natural and artificial defence. The castle is protected on three sides by the river and the sea; the landward approach is barred by a deep rock-cut ditch and a formidable gatehouse flanked by two massive towers. The main entrance leads directly into the walled borough laid out alongside -- a planned English town whose grid of streets and burgage plots still survives. The castle itself encloses two courtyards: an outer ward for the garrison and an inner ward reserved for the royal household, with hall, chambers, chapel, kitchens, and stores.

The towers are hollow, each containing three or four storeys of chambers linked by spiral stairs; the great hall, though roofless today, retains its magnificent fireplace and traces of traceried windows. A unique feature is the system of mural galleries -- passages within the thickness of the walls -- that allowed defenders to move unseen from tower to tower. The whole design was conceived for siege warfare: archers on the battlements, crossbowmen in the embrasures, stones dropped through murder holes. Yet Conwy was never taken by force; its strength lay in its position and its engineering.

A Capital of Conquest

Conwy was more than a garrison. It served as administrative heart of the new county of Caernarfonshire, seat of the sheriff, and venue for judicial sessions. Edward intended it as a model English settlement: burgesses granted privileges, markets established, English law proclaimed. The castle's presence ensured that the Welsh, though subdued, remained under constant surveillance. In 1294-95 Madog ap Llywelyn's revolt brought siege; the garrison held. Owain Glyndwr's rising saw the town burned in 1401, yet the castle itself withstood every assault. Its walls never yielded to an enemy escalade.

Decline and Enduring Grandeur

After the medieval period the castle's military role faded. The Tudors had less need of frontier fortresses; the Civil War saw it garrisoned for the King but never seriously threatened. Slighted in part after 1646, it fell into decay until the nineteenth century, when the Office of Works and later Cadw began systematic preservation. Today it stands among the most complete of all Edwardian castles -- a UNESCO World Heritage Site whose walls and towers remain roofless yet unbroken, its town walls still encircling the streets Edward laid out.

To walk Conwy's battlements is to sense the weight of conquest. The towers still command the river; the town walls still enclose the borough; the sea still laps at the base of the rock. Here Edward sought to make Welsh independence impossible; instead he gave Wales one of its most majestic monuments. Conwy Castle is not merely a ruin; it is a testament to ruthless ambition that has outlived its purpose -- a stronghold whose stones speak still of strategy, siege, and the long, unyielding dialogue between conqueror and conquered.

Conwy Castle and the Elden Ring Film: A Fortress Chosen for the Screen

In May 2026, Conwy Castle closed to the public for the first time in years. Filming began at the site on 21 May, with London-based Katana Films Ltd using the castle and the adjacent Vicarage Gardens Car Park for a major feature film production. Preparatory works had begun as early as 14 May, with the castle closing to visitors a day later on the 15th.

The project is widely believed to be director Alex Garland's adaptation of Elden Ring, the award-winning FromSoftware video game. Garland, known for Ex Machina, Annihilation, and 28 Days Later, has not confirmed the project publicly. The same production also used Dolbadarn Castle in Llanberis from 21 to 31 May as part of the same shoot.

The choice of Conwy is not difficult to understand. Its eight drum towers, intact curtain walls, and position above the river estuary create a skyline that reads as unambiguously medieval in a way that very few locations in Europe can match. It is not a ruin in the conventional sense -- it is a near-complete fortress whose scale and geometry are immediately legible on camera. Where Dolbadarn offers intimacy and atmosphere, Conwy offers spectacle and dominance. Together they represent two very different registers of the same medieval Welsh landscape.

Elden Ring as a game draws heavily on the visual grammar of fortress architecture -- towers that command rather than shelter, walls that enclose rather than protect, stone that outlasts the civilisations that raised it. Conwy, built by a conquering king to make Welsh independence permanently impossible, carries precisely that quality. Edward I intended it as a statement that could not be argued with. Eight hundred years later, a film crew arrived and found that it still cannot.

Frequently Asked Questions About Conwy Castle

Is Conwy Castle being used for a film?

Yes. Conwy Castle closed to visitors from 15 to 22 May 2026 while London-based production company Katana Films Ltd used the site for a major feature film production. Preparatory works began on 14 May and filming got underway on 21 May. The same company also filmed at Dolbadarn Castle in Llanberis as part of the same project.

What film was made at Conwy Castle?

Katana Films Ltd has not officially confirmed the project. Industry sources widely believe the production to be director Alex Garland's adaptation of Elden Ring, the award-winning FromSoftware video game. Garland is known for Ex Machina, Annihilation, and 28 Days Later. No official announcement has been made at the time of writing.

What is Conwy Castle and why is it important?

Conwy Castle is a 13th-century fortress built by Edward I during his conquest of Wales. It is one of the best-preserved medieval castles in Europe and forms part of a UNESCO World Heritage Site, highlighting its architectural and historical significance.

When was Conwy Castle built?

Conwy Castle was constructed between 1283 and 1289 as part of Edward I's campaign to control Wales. It was built alongside the fortified town walls, forming a complete defensive and administrative stronghold.

Why did Edward I build Conwy Castle?

Edward I built Conwy Castle to secure his conquest of Wales and assert English dominance. It formed part of the Iron Ring of castles designed to control key routes, suppress resistance, and project royal authority across the region.

Who designed Conwy Castle?

The castle was designed by James of St George, Edward I's master mason. He was responsible for several major Welsh castles and introduced advanced European military architecture into Britain.

What makes Conwy Castle unique?

Conwy Castle is renowned for its eight massive towers, intact town walls, and well-preserved royal apartments. It also features early stone defensive elements and a strategic coastal location, allowing supplies to be delivered by sea during sieges.

Was Conwy Castle ever attacked?

Yes. Conwy Castle played a role in several conflicts, including Welsh uprisings and later wars. It famously withstood a siege during the revolt of Madog ap Llywelyn and was later captured during the rebellion of Owain Glyndwr.

What was life like inside Conwy Castle?

Life inside the castle varied greatly. While it housed soldiers and administrators, it also contained royal apartments for visiting monarchs. However, these were used only occasionally, suggesting the castle was primarily a symbol of control rather than a permanent royal residence.

Is Conwy Castle still standing today?

Yes. Although partially ruined after the English Civil War, Conwy Castle remains one of the most impressive medieval sites in Britain. It is now managed by Cadw and is open to visitors.

Why is Conwy Castle a UNESCO World Heritage Site?

Conwy Castle is recognised by UNESCO as one of the finest examples of late medieval military architecture in Europe. Its design, preservation, and role in Edward I's conquest make it historically exceptional.

Plan Your Visit

Getting There

• Location: Rose Hill Street, Conwy LL32 8AY.
• By Car: Follow signs into Conwy town centre. A pay-and-display car park is located directly next to the castle.
• By Public Transport: Conwy railway station is a short walk from the castle. Regular bus services also connect Conwy with Llandudno, Bangor, and Llandudno Junction.
• On Foot: The castle is centrally located near the waterfront and easily reachable on foot from anywhere in the town.

Facilities and Accessibility

• Amenities: Accessible toilets are available on-site for visitors.
• Terrain: Parts of the castle feature uneven ground and steps. Some areas may not be suitable for prams or wheelchair users.
• Support: Staff are on hand to assist with any specific access requirements.

Dog Policy

• Grounds: Dogs are welcome provided they are kept on a lead within the castle grounds.
• Exhibitions: Only assistance dogs are permitted inside any enclosed exhibition areas.

• Visit Wales: https://www.visitwales.com
• Cadw: https://cadw.gov.wales
• National Trust: https://www.nationaltrust.org.uk/visit/wales/castles-forts

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