Established in 1839, this antiques store is one of the few still holding on to its spot on the Place du Grand Sablon. Its salons are filled with 18th-century furniture and objets - and sometimes with audiences for Baroque concerts - but the courtyard is what sets Costermans apart. There, dozens of cast-iron fire backs lean three-deep on the cobblestones. Hundreds of other fireplace accessories fill an enfilade of rooms bordering the courtyard, as do handsome lanterns for indoors or out. If you don't find what you're looking for, Costermans will make it for you.