Columbia subject headings:
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--Religion.
Rome--Religion.
Princeton subject headings:
Church history--Primitive and early church, ca. 30-600.
Constantine I, Emperor of Rome, -337--Religion.
Rome--Religion.