Columbia subject headings:
Palaces--Italy--Emilia-Romagna--History.
Harvard subject headings:
Architecture, Domestic--Italy--Emilia-Romagna.
Decoration and ornament--Italy--Emilia-Romagna.
Emilia-Romagna (Italy)--Buildings, structures, etc.
Palaces--Italy--Emilia-Romagna--History.
Princeton subject headings: