Columbia subject headings:
Church and state--Holy Roman Empire.
Church history--11th century.
Church renewal--Catholic Church--History--To 1500.
Fuhrmann, Horst--Bibliography.
Gregory VII, Pope, approximately 1015-1085.
Harvard subject headings:
Church and state--Holy Roman Empire
Church history--11th century.
Church renewal--Catholic Church--History--To 1500.
Fuhrmann, Horst--Bibliography.
Gregory VII, Pope, approximately 1015-1085
Princeton subject headings:
Church and state--Holy Roman Empire.
Church history--11th century.
Church renewal--Catholic Church--History--To 1500.
Fuhrmann, Horst--Bibliography.
Gregory VII, Pope, approximately 1015-1085.