The second story of the central zone displays a pair of nested pediments.The outer corners have two piers with applied Corinthian pilasters, supporting a crowning triangular pediment. Nested within this is a segmental pediment slightly brought forward, and supported by a pair of Corinthian columns within a pair of Corinthian pilasters.

The entablature is broken in the center for a heraldic shield with olive sprays, which used to display the coat-of-arms of Pope Alexander VII until it was defaced by the occupying French at the end of the 19th century. Through the tall central window, the circular window of the Quattrocento church façade is visible.