Relief of the tympanum. It underlines the qualities of Borgo San Donnino (Fidenza) and the importance of the temple dedicated to the martyr. On the left Charlemagne, who made it an imperial church; in the middle, pope Adriano II (867-872) who gives the miter and the pastoral to the archpriest of the town; on the right, a sick man enters in the sanctuary to implore for healing. On the top, the mystical lamb. Above the relief, Giovanni Pallavicino.