Columbia subject headings:
Augustine, of Hippo, Saint, 354-430.
Church history--Primitive and early church, ca. 30-600.
Gregory I, Pope, approximately 540-604.
Harvard subject headings:
Augustine, of Hippo, Saint, 354-430
Church history--Primitive and early church, ca. 30-600
Gregory I, Pope, approximately 540-604
Princeton subject headings:
Augustine, of Hippo, Saint, 354-430.
Church history--Primitive and early church, ca. 30-600.
Gregory I, Pope, approximately 540-604.