Lord Warden of the Cinque Ports was combined from 1267 with the office of Constable of Dover Castle. However, from 1708 Walmer Castle at Deal was to be preferred as the official residence of the Lord Warden of the Cinque Ports. The Lord Warden also holds the office of Admiral of the Cinque Ports with a maritime jurisdiction extending to the middle of the English Channel, from Redcliffe near Seaford, in Sussex to the shore underneath the Naze Tower, encompassing Brightlingsea in Essex, the only Cinque Port north of the Thames. In earlier centuries the northern limit was taken as the Shoe Beacon in Essex. The
Lord Warden of the Cinque Ports powers of muster", and the Constableship of Dover Castle, later added (1267) to the Warden's office, enabled him to keep a garrison and administrative staff, including the Clerk and the Lieutenant of the Castle. The coat of arms of the Cinque Ports first appeared in 1305, second amongst the earliest English known heraldic emblems, predating even the coat of arms of the City of London. The coat of arms of the Cinque Ports displays three ships' hulls and three lions conjoined to these hulls, all in gold. These may originally have been "Gules three lions passant gardant in pale "