The little piazza behind the Loggia del Pesce—originally built under Cosimo I for the city’s fishmongers—hosts a daily flea market. Rifle through the stalls and little shops in search of costume jewelry, Tiffany lamps, secondhand dolls, vintage postcards, weird objects, mismatched crockery, and other one-off ephemera. The market runs daily, although not every unit is open every day.