Only the tower remains of the original church, and is in late Romanesque style, dating from 1220-1230. It has a bell which hangs externally to the spire. The rest of the church is Gothic; a parish church since 1252, and collegiate church since 1454, later on pilgrimage church. The transept was built between 1457 and 1488 by Layens. It has been closed since 1964 and is considered unstable due to war damage. Restoration is planned.