Motte and two baileys dating from 1068. Besieged for 3 months in 1102. Shell keep of Caen stone dates from circa 1138. Also remains a gatehouse and a C13 barbican and curtain wall. The castle was subjected to a 'unfeeling' rebuild in 1791-1815, which replaced sections destroyed in the civil war and altered many of the surviving buildings. Lower part of gatehouse possibly late C11, built for Roger de Montgomery, who was granted Arundel by William the Conqueror. Middle stage of gatehouse, keep, and cellars under south-east range appear (stylistically) to date from late C12; possibly from tenure of Earl William de Albini. Barbican, upper stage of gatehouse, north-west buttress, and well tower to keep, appear (stylistically) to date from late C13, possibly from time of Richard, 1st Earl of Arundel, who received the grant of a fair to help repair the castle. Curtain and towers round north end also mediaeval, but of uncertain date, and restored in late C19. (Listing report)
"Arundel Castle is a great disappointment". A late 11th century castle with subsequent additions and modifications including "silly spirited Gothic additions of 1791-1815" and "an almost complete rebuilding in an unfeeling Windsor Castle style which neither amuses nor convinces". (PastScape–ref. Pevesner)
Remains a large and important noble house with a large park to the north. The standing medieval remains are important and the shell keep is a fine example of the type. Visitors should not feel compelled to follow Pevesner's opinion of the castle.