 When Warwick Castle was rebuilt in the reign of King Henry II it had a new layout with the buildings against the curtain walls. The castle is surrounded by a dry moat on the northern side where there is no protection from the river or the old motte; the perimeter of the walls is 130 metres (140 yd) long by 82 metres (90 yd) wide. The two entrances to castle are in the north and west walls. There was originally a drawbridge over the moat in the north east. In the centre of the north west wall is a gateway with Clarence and Bears towers on either side; this is a 15th-century addition to the fortifications of the castle. The residential buildings line the eastern side of the castle, facing the River Avon. These buildings include the great hall, the library, bedrooms, and the chapel.
