Columbia subject headings:
Harvard subject headings:
Europe--History--476-1492.
Italy--History--Germanic rule, 962-1268.
Italy--History--Period of the Italian Kings, 887-962.
Pistoia (Italy)--History.
Princeton subject headings:
Europe--History--476-1492.
Italy--History--Germanic rule, 962-1268.
Italy--History--Period of the Italian Kings, 887-962.
Pistoia (Italy)--History.