The Cathedral of Ancona, dedicated to Judas Cyriacus, was consecrated at the beginning of the 11th century and completed in 1189.Some writers suppose that the original church was in the form of a basilica and belonged to the 7th century. An early restoration was completed in 1234. It is a fine Romanesque building in grey stone, built in the form of a Greek cross, and other elements of Byzantine art. It has a dodecagonal dome over the center slightly altered by Margaritone d'Arezzo in 1270. The façade has a Gothic portal, ascribed to Giorgio da Como (1228), which was intended to have a lateral arch on each side.