Columbia subject headings:
France--Politics and government--987-1328--Congresses.
France--Politics and government--To 987--Congresses.
Langres (France : Diocese)--History--Congresses.
Langres (France)--Church history--Congresses.
Harvard subject headings:
France--Politics and government--987-1328--Congresses.
France--Politics and government--To 987--Congresses.
Langres (France)--Church history--Congresses.
Langres (France)--History.
Princeton subject headings: