Columbia subject headings:
Bishops--Germany--Bavaria--History--To 1500.
Bishops--Germany--Swabia--History--To 1500.
Church and state--Holy Roman Empire--History--To 1500.
Germany--Church history--843-1517.
Holy Roman Empire--History--843-1273.
Harvard subject headings:
Bishops--Holy Roman Empire.
Holy Roman Empire--Church history.
Holy Roman Empire--History--843-1273.
Princeton subject headings:
Bishops--Holy Roman Empire.
Germany--History--843-1273.
Holy Roman Empire--Church history.
Holy Roman Empire--History--843-1273.