The foundation of St. Ouen's Abbey has been variously credited, among others, to Clothair I and to St. Clothilda, but evidence is scanty. It was dedicated at first to St. Peter when the body of St. Ouen, Archbishop of Rouen (d. 678), was buried there; the name of St. Peter and St. Ouen became common and finally St. Ouen only. The history of the abbey, on record from the 1000, is unremarkable; a list of abbots is in Gallia Christiana XI, 140. In 1660 the monastery was united to the Congregation of St. Maur, and when suppressed, in 1794, the community numbered twenty-four. The abbey building itself was vacated by the time of the French Revolution and was subsequently occupied by the Town Hall of Rouen.