The White Tower, standing 90 feet high with walls between 11 and 15 foot thick. This was the original Tower. Construction was started by William the Conqueror in 1078 and finished after 1097 by his sons and successors. The Tower was made with Caen stone and occupies the central area of the Tower of London.
This is where the displays of armour and weaponry on through the centuries are held. The White Tower was used as the main Kings Armoury from the 14th century and main repository for gun powder through the seventeenth century.
The north east turret was once the location for the first Royal Observatory. In 1974 a bomb exploded here killing one person. It is thought to have been the work of the IRA.