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