Columbia subject headings:
Harvard subject headings:
Acropolis (Athens, Greece)--Congresses.
Athens (Greece)--Buildings, structures, etc.--Conservation and restoration--Congresses.
Historic sites--Conservation and restoration--Greece--Athens--Congresses.
Parthenon (Athens, Greece)--Congresses.
Temples--Greece--Athens--Conservation and restoration--Congresses.
Princeton subject headings:
Acropolis (Athens, Greece)--Congresses.
Athens (Greece)--Buildings, structures, etc.--Congresses.
Parthenon (Athens, Greece)--Congresses.
Public buildings--Greece--Athens--Conservation and restoration--Congresses.