The Tower of London is located on the north bank of the Thames in London, near Tower Bridge. The Tower of London complex includes several rebuilt defences and the King's Palace, numerous towers such as Wakefield Tower and St Thomas Tower as well as core defences - the White Tower, and buildings such as the "Door of the renegades". [The Tower of London is the crystallization of the wisdom of the British era, after the expansion and renovation of the two generations of monarchs, so it also reflects the different styles of the different eras of Britain. The official name of the Tower of London is "Her Majesty's Palace and Castle - Tower of London", originally built to control the entire city of London, The 18-acre tower of london used to hold upper-class prisoners in particular as fortresses, armoury, treasury, mint, palace, execution ground, public archives office, observatory, sanctuary and prison.