Saint-Ouen Abbey, is a large Gothic Catholic church and former Benedictine monastic church in Rouen. It is named for Audoin, 7th-century bishop of Rouen in modern Normandy, France. The church's name is sometimes anglicized as St Owen's. Built on a similar scale to nearby Rouen Cathedral, the abbey is famous for both its architecture and its large, unaltered Cavaillé-Coll organ, which was described by Charles-Marie Widor as "a Michelangelo of an organ". With the cathedral and the Church of Saint-Maclou, Saint-Ouen is one of the principal French Gothic monuments of the city.

Rouen is a city on the River Seine in northern France. It is the prefecture of the region of Normandy and the department of Seine-Maritime. Formerly one of the largest and most prosperous cities of medieval Europe, the population of the metropolitan area is 702,945 (2018). People from Rouen are known as Rouennais.