Poitiers is a city on the Clain river in west-central France. It is a commune and the capital of the Vienne department and of the Poitou-Charentes region. Poitiers is a major university centre. The centre of town is picturesque and its streets include predominant historical architecture, especially religious architecture and especially from the Romanesque period. Two major military battles took place near the city: in 732, the Battle of Poitiers (also known as the Battle of Tours), in which the Franks commanded by Charles Martel halted the expansion of the Umayyad Caliphate, and in 1356, the Battle of Poitiers, a key victory for the English forces during the Hundred Years' War. This battle's consequences partly provoked the Jacquerie.