Columbia subject headings:
Harvard subject headings:
Cistercian monasteries--Germany--History.
Cistercians--Germany--History.
Germany--Church history--843-1517.
Germany--History--To 1517.
Germany--Relations--Slavic countries.
Slavic countries--Relations--Germany.
Slavs--Germany--Economic conditions.
Slavs--Germany--Social conditions.
Princeton subject headings:
Cistercians--Europe, Eastern--History.
Cities and towns, Medieval--Europe, Eastern.
Economic history--Medieval, 500-1500.