Allegorical figures of Wisdom and Diligence stand on either side of an empty circle that Federico probably intended to contain an emblem, such as the sugar loaf belonging to the Zuccaro family. On the left, the small cherub representing Wisdom holds a shield and spear. A head, perhaps that of the goddess Minerva, decorates the shield. Another cupid on the right, signifying Diligence, holds a spade from which sprouts a bunch of grain and a shield decorated with a spider web.