The Spiegelkwartier is a cluster of antique shops and art galleries concentrated on Nieuwe Spiegelstraat, running from the Herengracht toward the Rijksmuseum. Dealers here specialise in everything from old masters and Delftware to Art Deco furniture, pre-Columbian artefacts, and Asian antiquities.
Prices are serious rather than bargain-market, and quality is generally high. Even if you're not buying, it's worth a walk — the window displays alone are a visual education in European decorative arts.