Santa Maria del Popolo

Rome has more than 900 churches, all of them free, displaying great works of Renaissance and Baroque art and architecture by the likes of Raphael, Bernini, Caravaggio, Bramante, Pinturricchio, and Annibale Carracci—and that's just the shortlist of artists contained in one church, the little-visited Santa Maria del Popolo, located on the north side of the Piazza del Popolo. According to legend, it was built to exorcise the ghost of Nero from a copse of trees.