This building used to be a pawnshop, but now is reserved for the more profitable and saleable jewelry, with a couple of small rooms set aside for art and antiques. Pedro Romero de Terreros, the Count of Regla, an 18th-century silver magnate from Pachuca, donated the present building so that Mexican people could get low-interest loans. It's open Monday through Friday from 8:30am to 6pm, Saturday from 8:30am to 3pm.