Columbia subject headings:
Antiquities--Congresses.
Archives--History--To 500--Congresses.
Seals (Numismatics)--History--Congresses.
Harvard subject headings:
Archives--History--To 500--Congresses.
Eurasia--Antiquities--Congresses.
Seals (Numismatics)--Eurasia--Congresses.
Princeton subject headings:
Antiquities--Archival resources--Congresses.
Archives--History--Congresses.