Columbia subject headings:
Architecture, Roman--Conservation and restoration--Europe--Congresses.
Europe--Antiquities, Roman--Conservation and restoration--Congresses.
Harvard subject headings:
Architecture, Roman--Conservation and restoration--Europe--Congresses.
Architecture, Roman--Europe--Conservation and restoration--Congresses.
Europe--Antiquities, Roman--Conservation and restoration--Congresses.
Romans--Europe--Congresses.
Princeton subject headings:
Architecture, Roman--Europe--Conservation and restoration--Congresses.
Europe--Antiquities, Roman--Conservation and restoration--Congresses.