Anjou (French pronunciation: [ɑ̃ʒu]) is a former county, duchy (1360) and province centred on the city of Angers in the lower Loire Valley of western France. Its traditional Latin name was Andegavia.
Anjou, or then the Angevin march (border lands) formed the border between Neustria and Aquitaine. It also bordered between Neustria and Brittany. Sitting on a black slate rock was the Roman fortress of Angers. It guarded the rivers Mayenne and Loire that flowed around it.