Architecture
Conway replaced Deganwy Castle, an earlier stronghold built by Henry III that had been destroyed by Llywelyn the Last in 1263.
Conway's design and work were overseen by master mason James of St. George using 1,500 labourers and stonecutters. An estimated £15,000 was spent building the castle and the town's defences, the largest single sum Edward I spent on any of his Welsh castles between 1277 and 1304.
In comparison to other great Edwardian castles it is relatively straightforward in design, a reflection of the inherent strength of its siting. There are no concentric 'walls within walls' here. Conway's massive military strength springs from the rock on which it stands and seems to grow naturally. Soaring curtain walls and eight huge round towers give the castle an intimidating presence.
The defences are in a linear arrangement because, like Caernarfon Castle, it is a spur castle built on a rock promontory. This was to prevent undermining and also guard the entrance to the River Conway. The promontory, which is about 15 metres (49 ft) high, was originally surrounded by the river on two sides.
The new castle was designed to have an outer and inner ward. Each ward was protected by four towers more than 70 feet (21 m) high, 30 feet (9.1 m) in diameter and consisting of several floors. The inner ward's towers also had the additional defence of archers' turrets.

Access to the castle was originally up a stepped ramp (bottom right on the plan) - of which, a small part remains - across a drawbridge, through a gateway with portcullis and into the barbican. Entrants then turned left through the main gateway into the outer ward. This housed the main living quarters for the garrison and the prison tower.
The inner ward (left on the plan) was separated from the rest of the castle by a 15 feet (4.6 m) thick wall with enfilading arrow slits. It also had a deep rock gully and an indirect gateway.
In the event of attack, these measures would create a bottleneck because the inner ward gateway was positioned at a right-hand turn to the wall.
The inner ward contained Edward I's heated Royal Apartments and the castle's Great Hall. At the rear of the fortress, another barbican guarded the postern entrance from the River Conway.
In the 13th century, a watchtower was built on the site of Bodysgallen Hall. Its purpose was to act as a lookout towards the north an area not easily watched from Conway itself. Some of the stone used in construction of Conway Castle has been linked to a quarry at Bodysgallen |