Deals with this beautifully moated fortress set in the Home County of Hertfordshire. The castle history from its foundation, possibly by Robert of Mortain, the Conqueror's brother, to its resumption as a royal residence and home of the Queens of England is examined.
This is followed by the detailed description of the castle remains with references to the site clearances and excavations which took place earlier this century. The external earthworks of the castle are also examined with the conclusion that they were probably constructed for King John before the castle's siege in 1216.