Sculpted figures in high relief set against recessed panels alternate with pedimented windows.
The upper floor has, at the centre, a tripartite pedimented window.
The portico is reinforced by a round-arched main entrance and pedimented second-story window above.
The main bay has a blocked pedimented round-headed window over the door.
It has a shed roof and features pedimented windows and a decorative cornice.
Columns flank pedimented windows on ground floor and central door, with windows lighting the galleries above.
The pedimented windows stand above mezzanine openings, reflecting the interior arrangement.
The three-by-one-bay end pavilions are turned so that their narrow ends face north and south, with pedimented windows in the center of the main bay.
Actually, the Pope was only involved in the facade, a soaring multiplanar composition of pilasters, statue niches, and heavily pedimented windows.
The rear of the building is symmetrical with pedimented windows and semicircular ground-floor arches.
