Sunday is antiques day in Puebla, and Callejón de los Sapos (Alley of the Frogs) heaves with dealers, parading all you can imagine

Callejón de los Sapos (Alley of the Toads) is a pedestrian street with a series of antique stores where you can purchase special and rare items. Besides there are several restaurants and bars to enjoy a tasty meal or the local fruit liquors. There are Mariachi groups and trios every night. 

http://www.arduinna.com.mx/pdf/pbc_en.pdf