Columbia subject headings:
Harvard subject headings:
Catholic Church--Foreign relations--Holy Roman Empire.
Church history--Middle Ages, 600-1500
Holy Roman Empire--Charters, grants, privileges.
Holy Roman Empire--Foreign relations--Catholic Church.
Holy Roman Empire--History--To 1517.
Regesta imperii.
Princeton subject headings:
Catholic Church--Foreign relations--Holy Roman Empire.
Church history--Middle Ages, 600-1500.
Holy Roman Empire--Foreign relations--Catholic Church.
Holy Roman Empire--History--To 1517.