Columbia subject headings:
Architecture, Domestic--Italy--Palermo (Province)
Mansions--Italy--Palermo (Province)
Nobility--Homes and haunts--Italy--Palermo (Province)
Palermo (Italy : Province)--Buildings, structures, etc.
Harvard subject headings:
Architecture, Domestic--Italy--Palermo (Province)
Architecture--Italy--Palermo (Province)--History.
Mansions--Italy--Palermo (Province)
Nobility--Homes and haunts--Italy--Palermo (Province)
Palermo (Italy : Province)--Buildings, structures, etc.
Princeton subject headings:
Architecture, Domestic--Italy--Palermo Region.