Columbia subject headings:
Italy--History--Germanic rule, 962-1268--Congresses.
Matilde, di Canossa, contessa, 1046-1115--Congresses.
Tuscany (Italy)--History--To 1434.
Harvard subject headings:
Italy--History--Germanic rule, 962-1268--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.