The Proto Palace, with a strict neoclassical design: the ground floor is entirely covered with smooth ashlar that incorporates the simple openings of the gate (just marked by the coat of arms) and the shops; five elegant balconies open on the main floor and the attic is crowned by palmetted acroters. The main prospect is faithfully confirmed on via Ryolo. Particularly successful is the arrangement of the small courtyard with elegant staircase access to the first floor.