Columbia subject headings:
Italy--Politics and government--1268-1559--Congresses.
Italy--Politics and government--1559-1789--Congresses.
Harvard subject headings:
Italy--Politics and government--1268-1559--Congresses.
Italy--Politics and government--1559-1789--Congresses.
Princeton subject headings:
Italy--Politics and government--1268-1559--Congresses.
Italy--Politics and government--1559-1789--Congresses.