Calais, French port city on the Strait of Dover, is a traditional point of entry to the Continent from England. It was occupied by Edward III in 1347, and remained under the control of England until 1558. In 1796 Edmund Burke referred to this historical role, saying that Calais had been "the key of France, and the bridle in the mouth of that power . . . . " (Letter to a Noble Lord, p. 168).