Its design is uniform and elegant, consisting of three square towers, one in the centre and one at each end, each tower containing three apartments 10 feet square; the intermediate space is occupied by a range of 15 arched door-ways of cut stone, and 16 square windows--a doorway and a window being placed alternately next to each other all along the range, an arrangement which leaves no doubt that they were designed for shops or merchant's ware-rooms.