Above the pediment is a large oculus (or round window) surrounded by a ring of twelve eight-pointed stars, this ring being broken by a benefactor's inscription running underneath the cornice. This latter reads
Peter Aldobrandini, Cardinal Deacon of the Holy Roman Church.

The oculus is flanked by a pair of panels showing reliefs of saints, the one on the left being St. Nicholas in bishop's robes, and to the right, St. Mark and St. Marcellus, third-century martyrs buried in the church. Below each panel is a star and a swag