Columbia subject headings:
Church and state--Rome--History--Sources.
Church history--Primitive and early church, ca. 30-600--Sources.
Harvard subject headings:
Church and state--Rome--History--Sources.
Church history--Primitive and early church, ca. 30-600--Sources.
Constantine I, Emperor of Rome, -337--Religion.
Rome--History--Constantine I, the Great, 306-337--Sources.
Princeton subject headings:
Church and state--Rome--History--Sources.
Church history--Primitive and early church, ca. 30-600--Sources.