The oroginal castle built by [[William I]] was a wooden motte and bailey construction but the castle was extended during the centuries that followed. [[Henry I]], William's son, replaced the original wooden structure with a stone keep and Henry II, the first of the Plantagenet dynasty, added the Round Tower. He also built the first of the castle's medieval state apartments. | The oroginal castle built by [[William I]] was a wooden motte and bailey construction but the castle was extended during the centuries that followed. [[Henry I]], William's son, replaced the original wooden structure with a stone keep and Henry II, the first of the Plantagenet dynasty, added the Round Tower. He also built the first of the castle's medieval state apartments. |