Columbia subject headings:
Lower Saxony (Germany)--History.
Nobility--Germany--Lower Saxony--History.
Harvard subject headings:
Germany, Northern--Kings and rulers--Sexual behavior--History--To 1500.
Germany, Northern--Kings and rulers--Social life and customs.
Marriages of royalty and nobility--Germany, Northern--History--To 1500.
Nobility--Germany, Northern--History--To 1500.
Princeton subject headings: