Partial ruin, partial reconstruction. Open to the public. Oldest surviving parts are the chapel (C12), and NE gateway (early C14), the rest is C15 or later.
1265 - ownership passes from the Ferrers to the Earls of Lancaster. Continues to belong to the Duchy to this date.
1442-50 - South Tower is built. Two towers, side by side with a staircase projection between towards bailey.
1450s - The North Tower is built.
1631-5 - Kings Lodgings built on the South wall.
1760 - Folly Keep constructed
