 Bazas was the seat of the Bishop of Bazas until the French Revolution (after which it was not restored but was instead, by the Concordat of 1801, divided between the dioceses of Bordeaux, Agen and Aire) and its main attraction is still the cathedral dedicated to Saint John the Baptist, so named because the blood of John the Baptist was venerated here.The cathedral dominates the town and stands at the east end of a wide, open space called the parvis.The cathedral dates mainly from the 13th-14th centuries, and was built on the model of the great Gothic cathedrals of northern France.