Columbia subject headings:
Architecture--Conservation and restoration--Italy--Lazio--Congresses.
Historic buildings--Conservation and restoration--Italy--Lazio--Congresses.
Lazio (Italy)--Antiquities--Collection and preservation--Congresses.
Harvard subject headings:
Architecture--Conservation and restoration--Italy--Congresses.
Historic buildings--Conservation and restoration--Italy--Congresses.
Princeton subject headings:
Architecture--Conservation and restoration--Italy--Congresses.
Historic buildings--Conservation and restoration--Italy--Congresses.