Columbia subject headings:
Church history--Primitive and early church, ca. 30-600--Congresses.
Rome--History--Empire, 30 B.C.-476 A.D.--Congresses.
Harvard subject headings:
Church history--Primitive and early church, ca. 30-600--Congresses.
Rome--History--Empire, 30 B.C.-476 A.D.--Congresses.
Princeton subject headings:
Aquileia (Italy)--Antiquities--Congresses.
Civilization, Ancient--Congresses.
History, Ancient--Congresses.