Columbia subject headings:
Augustine, Saint, Archbishop of Canterbury, -604?--Congresses.
Church history--Primitive and early church, ca. 30-600--Congresses.
Gregory I, Pope, approximately 540-604--Congresses.
Harvard subject headings:
Augustine, Saint, Archbishop of Canterbury, -604?--Congresses.
France--Church history--To 987--Congresses.
Great Britain--Church history--449-1066--Congresses.
Gregory I, Pope, approximately 540-604--Congresses.
Missions--History--Early church, ca. 30-600--Congresses.
Princeton subject headings: