The central tower of the Tower of London, the White Tower was established in the late 11th century. Constructed by William the Conqueror, it saw considerable architectural modifications and restructuring. It was built in order to provide a lodging place for the king and it has often been referred to as a magnificent palace in 11th century Europe. The tower’s western corner is flanked by square towers and the north-east gives way to a spiral staircase. The White Tower also houses the St John’s chapel, a beautiful place of worship.