Columbia subject headings:
Christianity--Rome.
Church and state--Rome.
Rome--Politics and government--284-476.
Rome.
Harvard subject headings:
Christianity--Rome.
Church and state--Rome.
Rome
Rome--Politics and government.
Princeton subject headings:
Church history--Primitive and early church, ca. 30-600.
Rome--Civilization.
Rome--History--Empire, 30 B.C.-476 A.D.