The Schepenhuis (Aldermen's House) on the Grote Markt is the oldest surviving town hall in the Low Countries, with roots in the 13th century. The Belfry attached to it is a UNESCO World Heritage site as part of the broader "Belfries of Belgium and France" listing.
The building is no longer used as a town hall but houses temporary exhibitions and a small museum on Aalst's history. The Belfry can be climbed in summer for a view over the rooftops and out toward the Dender.