Columbia subject headings:
Harvard subject headings:
Germany--History--Henry IV, 1056-1106.
Germany--History--Henry V, 1106-1125.
Holy Roman Empire--History--Franconian House, 1024-1125--Congresses.
Princeton subject headings:
Germany--History--Henry IV, 1056-1106--Congresses.
Germany--History--Henry V, 1106-1125--Congresses.
Heinrich V, Emperor of Germany, 1081-1125--Congresses.
Henry IV, Holy Roman Emperor, 1050-1106--Congresses.
Holy Roman Empire--History--Franconian House, 1024-1125--Congresses.