- With its seven polygonal towers (including the great Eagle Tower), two gatehouses, and walls of colour-banded stone, King Edward I intended the castle to be a royal residence and seat of government for north Wales. Begun in 1283 under the direction of Master James of St George, the King's mason-architect, and continuously in Crown possession since. Scene of much recent royal pageantry, including the 1969 Investiture of the Prince of Wales. World Heritage Site. Three site exhibitions; Regimental Museum of the Royal Welsh Fusiliers; The Eagle and the Dragon audio-visual display. There is a complete circuit of Town Walls, including eight towers and two twin towered gateways, surviving in places to battlement height.