On one end of the Piazza del Popolo is the 12th-century Romanesque-Gothic Duomo, which was built over the site of a Roman temple. The simple facade is enlivened by a finely carved rose window. Look up at that window as you step inside and you will notice its peculiarity: each "petal" of the rose has a cherub's face in the stained glass. You can see the rich brown tones of the wooden choir near the altar, but unless you have binoculars or request special permission in advance, you cannot get close enough to see all the exquisite detail in this Renaissance masterpiece of woodworking (1521-30). The severe, solid mass of the Duomo is mirrored by the Palazzo dei Priori (1595-97) across the way.
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