The original entrance to the White Tower

White Tower - Tower of London.

The original entrance to the White Tower was at first-floor level.

The White Tower is a keep (donjon), which was often the strongest structure in a medieval castle, and contained lodgings suitable for the lord or the king or his representative.

• Author: http://en.wikipedia.org/wiki/User:Padraig, Padraig
• Licence: Public domain by the author