Columbia subject headings:
Harvard subject headings:
Canossa (Castle)
Canossa (Reggio Emilia, Italy)--Description and travel.
Gregory VII, Pope, approximately 1015-1085
Henry IV, Holy Roman Emperor, 1050-1106.
Princeton subject headings:
Canossa (Castle)
Canossa (Italy)--Description and travel.
Gregory VII, Pope, approximately 1015-1085.
Henry IV, Holy Roman Emperor, 1050-1106.