All the doorways deserve special mention. The eastern of the two on the south side, with the porch of two stages in front of it, is remarkable for the extreme skill and delicacy of its enrichment. The shafts are of white marble, and the mouldings which separate them of red, while the former are all carved in the most delicate manner. The porch is mainly built of red marble, and is carried on detached shafts, cut out of one block knotted together and resting on lions. The whole of this work is evidently an addition to the aisle, and dates from about A.D. 1180. The other doorway on the same side may probably be a work of the original foundation in 1099. It has the twelve Apostles on the jambs, and rude shafts carrying a canopy in front of it. The west doorway has also a porch, and sculptures of the twelve months on its jambs. It is covered with carving of foliage and figures executed by the same Wiligelmus who was employed on the western doorway of San Zenone, Verona. Among other figures are those of King Arthur and his knights, inscribed with his name,[69] “Artus de Bretania,” above his head. The west front is very remarkable. The ends of the aisles have two arches inclosing small arcades similar to those in the bays of the side walls, and the end of the nave has the same arcade on each side of a porch of two stages in height, the lower of which is carried on detached [Illustration: 56. DUOMO. MODENA. p. 304.] shafts resting on lions’ backs. The upper part of the porch was altered in order that a great wheel window might be inserted, sometime in the fourteenth century.