Columbia subject headings:
Castles--Italy--Rome (Province)
Historic buildings--Italy--Rome (Province)
Rome (Italy : Province)--Description and travel.
Rome (Italy : Province)--Historical geography.
Harvard subject headings:
Castles--Italy--Rome (Province)
Historic buildings--Italy--Rome (Province)
Rome (Italy : Province)--Description and travel.
Rome (Italy : Province)--Historical geography.
Princeton subject headings:
Castles--Italy--Rome (Province).
Historic buildings--Italy--Rome (Province).
Rome (Italy : Province)--Description and travel.
Rome (Italy : Province)--Historical geography.