he palazzo De Ferrari-Belimbau overlooks the new piazza del Guastato and faces the church of the Santissima Annunziata del Vastato (1520).The piazza, which was extended when the moat 1547/48 was covered and the isolated construction housing the oratory of S. Tommaso and the S. Marta inn demolished, is surrounded by a number of palazzi structures, such as the palazzo indicated above, which form an impressive architectural backdrop.A few years after the palazzo was built, work started on the major urban and property development scheme involving the strada del Guastato (now via Balbi) carried out by the Balbi family, extending from Guastato to the porta di S. Tommaso.