This is the former church of a convent founded in the late 10C. Rebuilt at the end of the 13C in the Gothic style, it has preserved two Romanesque staircase turrets and a crypt. Extended in the 15C, converted in the late 18C, it was then restored by Cuypers (late 19C). In front is a red brick and white stone tower. The interior is surprisingly white. The raised eastern chancel, complete with Baroque altarpiece, dominates the Gothic crypt, home to the church's treasures.