Columbia subject headings:
Harvard subject headings:
Catholic Church. Diocese of Hildesheim (Germany)--History--Middle Ages, 600-1500.
Monasticism and religious orders for women--Germany--History--Middle Ages, 600-1500.
Stift Essen.
Princeton subject headings:
Christian art and symbolism--Germany--Essen.
Convents--Germany--Essen.
Stift Essen--History.