 The church was originally built as the abbey church of Saint-Ouen for the Benedictine Order, beginning in 1318 and interrupted by the Hundred Years' War and sacked and badly damaged during the Harelle.It was completed in the 15th century in the Flamboyant style.The foundation of Saint-Ouen Abbey has been variously credited, among others, to Chlothar I and to Clotilde, royal saint and wife of Clovis I, but evidence is scanty.