The last part of this floor is dedicated to a “museum within a museum.” To gain access, you need to go back to Piero Farnese’s Funerary Monument (room n. 22) and enter room n. 26, which is not a single room but five rooms, presenting the history of the façade made for the cathedral in the 19th century. We suggest that you go around, following the timeline proposed by the museum, until you find the final project by Emilio de Fabris, which is on your right when you enter the last room.