Walmer Castle against Charles' brother, King James II, the townsfolk of Deal seized Walmer Castle on behalf of William III, the Prince of Orange. By the end of the century, however, the castle was increasingly regarded as out of date from a military perspective. In the 18th century, Walmer Castle became the official residence of the Lord Warden of the Cinque Ports. The Lord Warden was originally a medieval title linked to five key ports along the coast of England; the position's prominence had faded, but it still retained important judicial and military functions. When Lionel Sackville, the Duke of Dorset, was
HMS Lord Warden (1865) side of the upper deck, was protected by wrought-iron armour that tapered from at the ends to amidships. It extended below the waterline. The forward chase guns on the upper deck were protected by 4.5-inch armour plates on the sides of the hull and a 4.5-inch transverse bulkhead to their rear protected them from raking fire. The armour was backed by of oak and the iron skin of the ship. "Lord Warden", named after the position of the Lord Warden of the Cinque Ports, was ordered on 25 May 1863 from Chatham Naval Dockyard. She was laid down on 24