Sandwich (Derivation: sandy harbour or trading centre) is a town in Kent, England, on the River Stour some 2 miles from the east coast. Before the river silted up in the 16th century Sandwich was one of the busiest ports in England, being close to the ecclesiastical capital, Canterbury. It was one of the five original medieval Cinque Ports (with Dover, Hastings, Romney and Hythe, and was attacked by the French more than once, the worst being in 1457 when the town was set alight and the mayor killed. Thomas Becket returned from exile through Sandwich, as did Richard I on his delayed return from the Crusades.
Between Sandwich and the sea lies the Royal St. George Golf Course, a popular venue for the British Open (13 times between 1894 and 2003). The town, through the non-stop play or work habits of its legendary 4th earl, gave its name to the bread-and-filling fast food. (See Sandwich.)
Reference: “Brewer’s Britain and Ireland”