Columbia subject headings:
Harvard subject headings:
Constance (Lake of, Region)--History.
Feudalism--Constance, Lake of, Region.
Feudalism--Germany--Hegau.
Hegau (Germany)--History.
Princeton subject headings:
Bodensee-Oberschwaben Region (Germany)--History, Local.
Nobility--Germany--Bodensee-Obserschwaben Region.