Florence, Tuscany, Italy
Originally outside the city's 12th-century walls, this piazza grew with the Franciscans, who used the large square for public preaching. During the Renaissance it was used for giostre (jousts), including one sponsored by Lorenzo de' Medici. "Bonfires of the vanities" occurred here, as well as soccer matches in the 16th century. Lined with many palazzi dating from the 15th and 16th centuries, the square remains one of Florence's loveliest piazze and is a great place to people-watch.