 Japelli collaborated with the engineer Bartolommeo Franceschini and the architect Giuseppe Petrelli, to whom we owe the merger of the balustrades of the terraces with the griffins.The painter Giovanni De Min, helped decorate the Greek room; Ippolito Caffi, the Roman room; Pietro Paoletti, the Pompeian room (or "Ercolana"); Vincenzo Gazzotto, painted the ceiling in the Renaissance Room.Antonio Pedrocchi died on January 22, 1852, and left the enterprise to the son of an apprentice, Domenico Cappellato.