The Tower of London is one of the most interesting historic sights of London. It is situated in the center of London on the north bank of the River Thames. The Tower was founded during the Norman Conquest of England sometimes at the end of 1066. It has 20 towers and the most important of all is the White Tower, which was built by William the Conqueror. The Tower has a long and rich history. It has once been a royal palace, a fortress, a prison, a place of execution and even a zoo. Today, it’s mainly a historical museum. While it was a royal palace, King Henry III kept three leopards, an elephant, a polar bear and several ravens there