Columbia subject headings:
Architecture, Domestic--Italy--Campagna di Roma.
Campagna di Roma (Italy)--Buildings, structures, etc.
Harvard subject headings:
Architecture, Domestic--Italy--Frascati Region.
Villa Angelina-Tuscolana-Vecchia (Italy)
Villa Mondragone (Italy)
Princeton subject headings:
Architecture, Domestic--Italy--Campagna di Roma.
Campagna di Roma (Italy)--Buildings, structures, etc.