The Great Tower at Raglan Castle, sometimes called the Yellow Tower of Gwent, sits outside the rest of the castle, protected by a moat and linked to the Fountain Court by a bridge. The fortification is representative of a trend during the 15th and 16th centuries in British castle building: tower keeps such as this, large, solid buildings designed for private accommodation, probably inspired by those in France, had started to appear in the 14th century at Dudley and Warkworth. In the 15th century the fashion spread, with the creation of French-influenced palatial castles featuring complex tower keeps, such as those at Wardour and Tattershall. These were expensive buildings to construct, each built to a unique design and, as historian Norman Pounds has suggested, "were designed to allow very rich men to live in luxury and splendour".