Columbia subject headings:
Harvard subject headings:
Architecture--Conservation and restoration--Italy--Rome--Guidebooks.
Historic buildings--Conservation and restoration--Italy--Rome.
Historic sites--Conservation and restoration--Italy--Rome.
Rome (Italy)--Buildings, structures, etc.
Rome (Italy)--Buildings, structures, etc.--Guidebooks.
Princeton subject headings:
Architecture--Conservation and restoration--Italy--Rome--Guidebooks.
Guidebooks.
Rome (Italy)--Buildings, structures, etc.--Guidebooks.