The choir, commenced in the 13th century and lasting until the 14th century, comprises three naves of equal height. It is one of the first examples of this type of construction, known as “hallekerke”. The current tower was formerly a belfry for the right bank of the River Scheldt.
Archaeologists discovered a Romanesque crypt from the 12th century there. The high altar is the work of a contemporary sculptor, Georges Grard (1970).