San Cerbone Cathedral, built in the square-shaped starry in the thirteenth century Pisan Romanesque style, while the tower is inspired by Romanesque elements Siena, the dome is octagonal in shape and the interior, with three naves, and many other works of art. To the left of the cathedral is the Bishop's Palace overlooking the square. Palazzo del Podesta, thirteenth century, overlooks the west side of the square in front of the steps preceding the cathedral, houses the Archaeological Museum.
Campiglia Marittima