If you arrive in Riquewihr on a quiet day, have a good look at the stately Maison Liebrich (1535) and at the Maison Preess-Zimmer (1686), on the main street (Rue du G??n??ral-de-Gaulle).
If you are in riqurwihr on a quiet day there ate great places to check. 
Only visit riqurwihr on noisy, busy days. 