Duke of Norfolk investiture, who were also Knights of the Order of the Garter across all creations of the title. <section end=FamilyTree /> Duke of Norfolk The Duke of Norfolk is the premier duke in the peerage of England, and also, as Earl of Arundel, the premier earl. The Duke of Norfolk is, moreover, the Earl Marshal and Hereditary Marshal of England. 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
Marshal of the air force head of state, but relinquishes the rank after completing his term in office. He can, however, be re-appointed to the rank if he later serves another term. The Duke of Edinburgh holds the ceremonial rank of a Marshal of the Royal Air Force, as well as the honorary ranks of Marshal of the Royal Australian Air Force and Marshal of the Royal New Zealand Air Force; owing to their smaller size, however, neither of the latter two air forces have ever used the rank in an operational capacity. Although the rank of Marshal of the Royal Canadian Air Force existed