The tower of London is a series of building constructed around the White Tower built by King William the Conqueror in 1078 to control London. It is called the White Tower because (it was said) it was first made from white stone from Caen (William’s hometown) in Normandy. Later Kings of England built additional towers to hold both prisoners and royal visitors. The infamous Bloody Tower (Where the two princes are supposed to have been killed) wad begun in 1597(during the reigns of Edward III and Richard II)