Brittany is the only area of continental Europe to preserve a Celtic language and culture.
Geographically, it is a peninsula that forms the westermost tip of France. The northern coast of Brittany forms the western beginning of the southern edge of the English Channel between Britain and France. There is only about a hundred miles of open sea between Brittany and Cornwall, a crossing easily navigated by the ships that brought British settlers who were escaping from the marauding Saxon invaders who swarmed into southern Britain in the 5th century.
So many of these settlers came that the original name of the area, Armorica, disappeared, displaced by the new name derived from the place of origin of the people who settled there. They founded a Celtic nation that preserved its independence for almost a thousand years, finally being taken over by France in 1488 and formally incorporated into the Kingdom of France in 1532.