Duchy of Brittany

The Duchy of Brittany (Breton: Dugelezh Breizh, French: Duché de Bretagne) was a medieval tribal and feudal state that existed between 936 and 1547, covering the northwestern peninsula of Europe, bordered by the Atlantic Ocean on the west and the English Channel to the north, and less definitively by the Loire River to the south and Normandy and other French provinces to the east.

The Duchy was preceded by a number of early kingdoms and can trace its formal origins to the expulsion of Viking occupiers in 937. The Duchy was merged into the Kingdom of France as a province by 1532, and was eliminated in 1792 during the formation of the French system of départements during the French Revolution.