The Duomo's 14th-century Gothic Baptistery was built to prop up one side of the Duomo. There are frescoes throughout, but the highlight is a large bronze 15th-century baptismal font designed by Jacopo della Quercia (1374-1438). It's adorned with bas-reliefs by various artists, including two by Renaissance masters: the Baptism of Christ by Lorenzo Ghiberti (1378-1455) and the Feast of Herod by Donatello.
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