Columbia subject headings:
Architecture, Classical--Conservation and restoration--Greece--Congresses.
Architecture--Conservation and restoration--Greece--Congresses.
Athens (Greece)--Buildings, structures, etc.--Conservation and restoration.
Erechtheum (Athens, Greece)--Conservation and restoration--Congresses.
Harvard subject headings:
Princeton subject headings:
Architecture, Classical--Conservation and restoration--Greece--Congresses.
Architecture--Conservation and restoration--Greece--Congresses.
Athens (Greece)--Buildings, structures, etc.--Conservation and restoration.
Erechtheum (Athens, Greece)--Conservation and restoration--Congresses.