The Mezzanino, once the residence of Luisa Rothschild, Baronessa Franchetti, is divided into four rooms of which three are communicating. The modern, functional furnishings match the elegant 19th-century elements, from the wooden floors to the fireplace in dark stone and majolica decorations with wrought iron andirons. The rooms are particularly suitable for displaying posters or holding small meetings related to the conferences held in the Sala del Portego.