Tower of London is a whole complex of buildings, performing at different times a variety of functions: arsenal, the royal palace, prison, mint and an observatory. Today, the Tower of London is best known because within its walls kept the British crown jewels. Construction of the "White Tower" was launched in 1078 by order of William the Conqueror. Since centuries the fortress grew and expanded, it appeared the new building. Was dug around the moat with water. White Tower in the center of the fortress seems the square, when in fact all its sides have different lengths. In his time the Tower of London has seen many famous prisoners and terrible crimes. Today, the Tower of London - a popular tourist destination, attracting visitors to the jewelry collection of the British crown and a large collection of weapons and armor.