Columbia subject headings:
Architecture--France--History--Archival resources--Congresses.
Cities and towns--France--History--Archival resources--Congresses.
Municipal archives--France--Congresses.
Harvard subject headings:
Architecture--France--History--Sources--Congresses.
Architecture--History--Sources--Congresses.
City planning--France--History--Sources--Congresses.
City planning--History--Sources--Congresses.
Princeton subject headings: