Duke of Norfolk is a title in the peerage of England, and is the premier non-royal peerage. The seat of the Duke of Norfolk is Arundel Castle in Sussex, although the title refers to the county of Norfolk. The current duke is Edward Fitzalan-Howard, 18th Duke of Norfolk. The dukes have historically been Catholic, a state of affairs known as recusancy in England.

Arundel Castle is a restored and remodelled medieval castle in Arundel, West Sussex, England. It was established by Roger de Montgomery in the 11th century. The castle was damaged in the English Civil War and then restored in the 18th and early 19th centuries by Charles Howard, 11th Duke of Norfolk. Further restoration and embellishment was undertaken from the 1890s by Charles Alban Buckler for the 15th Duke.