Columbia subject headings:
Church and state--Germany.
Church and state--Holy Roman Empire.
Conrad II, Holy Roman Emperor, approximately 990-1039.
Germany--Politics and government--843-1273.
Henry III, Holy Roman Emperor, 1017-1056.
Henry IV, Holy Roman Emperor, 1050-1106.
Holy Roman Empire--History--Conrad II, 1024-1039.
Holy Roman Empire--History--Henry III, 1039-1056.
Holy Roman Empire--History--Henry IV, 1056-1106.
Harvard subject headings:
Church and state--Germany
Church and state--Holy Roman Empire
Conrad II, Holy Roman Emperor, approximately 990-1039.
Germany--Politics and government--843-1273.
Henry III, Holy Roman Emperor, 1017-1056.
Henry IV, Holy Roman Emperor, 1050-1106.
Holy Roman Empire--History--Conrad II, 1024-1039.
Holy Roman Empire--History--Henry III, 1039-1056.
Holy Roman Empire--History--Henry IV, 1056-1106.
Princeton subject headings: