The former collegiate Church of Our Lady is a monument of Brabant High Gothic and more specifically of its local variant: Demergothic, recognisable among other things by the frequent use of iron sandstone (also called Diesterian).
Thanks to an original inscription in the choir, the name of architect Jacob Piccart and the construction date 1337 have remained known.
In the church interior, the choir stalls, the choir stalls and the wrought-iron chandelier are undisputed masterpieces of late Gothic.
In the side choirs, the monumental baroque altars are the main eye-catcher. Thanks to a recent restoration campaign, the latter can now be admired in their full glory. Among the altar retables, the panels 'The Mystical Wine Press', 'Prefigurations of the Eucharist in the Old Testament' and 'Scenes of St Barbara' and altar cloths by Gaspar de Crayer and Pieter-Jozef Verhaghen are especially worth mentioning.
Together with the 16th century statues of saints, the vault keys, the silverware (freely accessible in the museum treasury) and the archives present in the church, one can speak of an exceptional heritage ensemble.
A new 'peace carillon' was recently installed in the monumental west tower, landmark of the city.