The church of Saint-Ouen is shaped like a Latin cross. Its vessel is 40 metres long. The first floor of the tower, which stands at the crossing of the transepts, is of the thirteenth century, the second is of the fourteenth century and the third floor of the fifteenth century. The whole is covered with an octagonal and pointed roof. The portal, framed by two turrets each carrying a bell tower, is pure Romanesque style, just like the nave. The nave (interior and exterior) has a decoration of plated arcatures rather unusual in Normandy, which can hardly be found only in the church of Saint-Martin de Colombelles. Both a victim of the Reformation and the fighting of 1944, the church suffered considerable damage and was the object of numerous changes.