Definition of "palazzo"

Cecil Spenser's society—who soon shewed he could understand and enter into his views—became a source of great gratification, and his young countryman was almost domesticated at the palazzo.

1831, L[etitia] E[lizabeth] L[andon], Romance and Reality. […], volume II, London: Henry Colburn and Richard Bentley, […], pages 270–271

At the piazzas, Romans are usually surrounded by tourists attracted by the classical palazzos, churches, monuments and fountains.

1990 May 20, Betty Martin, “A Couple of Ways of Viewing 'the Eternal City'”, in Los Angeles Times‎