Founded in the 5th century to house the chains that supposedly bound St. Peter in Jerusalem (preserved under glass below the main altar), this lovely church is mainly worth visiting to see one of the world’s most famous sculptures: Michelangelo’s “Moses” ★★, carved for the tomb of Pope Julius II. Michelangelo never completed the 44 magnificent figures planned for the tomb, but this “minor” figure he did complete now numbers among his masterpieces.