Columbia subject headings:
Ansgar, Saint, Archbishop of Hamburg and Bremen, approximately 801-865.
Carolingians--Missions--History.
Europe, Northern--Church history--Middle Ages, 600-1500.
Harvard subject headings:
Ansgar, Saint, Archbishop of Hamburg and Bremen, approximately 801-865.
Germany--Church history--843-1517.
Missions--Germany.
Scandinavia--Church history--To 1500.
Princeton subject headings:
Ansgar, Saint, Archbishop of Hamburg and Bremen, approximately 801-865.
Germany--Church history--843-1517.
Missions--Germany.
Scandinavia--Church history--To 1500.