Columbia subject headings:
Harvard subject headings:
Church history--Middle Ages, 600-1500
Henry II, Holy Roman Emperor, 973-1024
Holy Roman Empire--Church history.
Holy Roman Empire--History--Henry II, 1002-1024
Papacy--History--To 1309
Peter, the Apostle, Saint
Princeton subject headings:
Church history--Middle Ages, 600-1500.
Henry II, Holy Roman Emperor, 973-1024.
Holy Roman Empire--Church history.
Holy Roman Empire--History--Henry II, 1002-1024.
Papacy--History--To 1309.
Peter, the Apostle, Saint