Columbia subject headings:
Europe--Relations--Italy--Congresses.
Italy--History--1268-1492--Congresses.
Italy--History--1492-1559--Congresses.
Italy--Relations--Europe--Congresses.
Middle Ages.
Harvard subject headings:
Europe--Relations--Italy--History--Congresses.
Italy--History--1268-1492--Congresses.
Italy--History--1492-1559--Congresses.
Italy--Relations--Europe--History--Congresses.
Middle Ages
Princeton subject headings:
Europe--Relations--Italy--History--Congresses.
Italy--Civilization--1268-1559--Congresses.
Italy--Relations--Europe--History--Congresses.
Middle Ages.