The Groenmarkt is the site of the town's former vegetable market. At no 39, admire the De Sleutel house, the façade of which is adorned with a key (or sleutel) and tympana with numerous arches. This façade, which dates back to 1550, is one of the oldest in the town. Admire also the beautiful facade embellished with tympana at no 53.