There are twenty-one towers. The central tower, begun by William the Conqueror, is known as the White Tower. The others are:
Bloody Tower
Beauchamp Tower
Bell Tower
Bowyer Tower
Brick Tower
Broad Arrow Tower
Byward Tower
Constable Tower
Cradle Tower
Develin Tower
Devereux Tower
Flint Tower
Lanthorn Tower
Martin Tower
Middle Tower
St Thomas Tower
Salt Tower
Wakefield Tower
Wardrobe Tower
Well Tower