The portal is divided into thirds both horizontally and vertically. At the lowest level, the door is framed at the center by richly decorated jambs, at each side of which stands a flat field interspersed with various relief sculptures. The second level is occupied by the tympanum and archivolt at the center and by blind arcades with caryatids at right and left. At the top, a frieze showing Christ with the twelve apostles stands at the middle, while figureless blind arcades stand at either side.