The decoration of this, the last chapel in the right aisle, was modified during the 18th century, when the Angels with the symbols of St. Catherine frescoes were added to the walls and the 16th century Virtures in tha vault were repainted. The small paintings on either side of the altarpiece are St. Stephen on the left, and St. Lawrence on the right. Both are by Marcello Venusti from 1560.