Columbia subject headings:
Canossa family--Congresses.
Civilization, Medieval--12th century--Congresses.
Eleventh century--Congresses.
Emilia-Romagna (Italy)--History--Congresses.
Holy Roman Empire--History--843-1273--Congresses.
Italy--History--Germanic rule, 962-1268--Congresses.
Matilde, di Canossa, contessa, 1046-1115--Congresses.
Tuscany (Italy)--History--To 1434--Congresses.
Harvard subject headings:
Canossa family--Congresses.
Emilia-Romagna (Italy)--History--Congresses.
Feudalism--Italy--History--Congresses.
Holy Roman Empire--History--843-1273--Congresses.
Italy--History--Germanic rule, 962-1268--Congresses.
Kings and rulers--Congresses.
Matilde, di Canossa, contessa, 1046-1115--Congresses.
Tuscany (Italy)--History--To 1434--Congresses.
Princeton subject headings:
Italy--History--Germanic rule, 962-1268--Congresses.
Matilde, di Canossa, contessa, 1046-1115--Congresses.
Tuscany (Italy)--History--To 1434--Congresses.