Warwick Castle is a medieval castle developed from an original built by William the Conqueror in 1068. Warwick is the county town of Warwickshire, England, situated on a bend of the River Avon. The original wooden motte-and-bailey castle was rebuilt in stone in the 12th century. During the Hundred Years War, the facade opposite the town was refortified, resulting in one of the most recognisable examples of 14th century military architecture.