Columbia subject headings:
Harvard subject headings:
Holy Roman Empire--History--Henry IV, 1056-1106.
Italy--History--Germanic rule, 962-1268.
Matilde, di Canossa, contessa, 1046-1115.
Tuscany (Italy)--History--To 1434.
Tuscany (Italy)--Kings and rulers--Biography.
Princeton subject headings:
Henry IV, Holy Roman Emperor, 1050-1106.
Matilde, di Canossa, contessa, 1046-1115.
Tuscany (Italy)--History--To 1434.
Tuscany (Italy)--Kings and rulers--Biography.