Columbia subject headings:
Cities and towns, Medieval--Italy--History.
City-states--Italy--History.
Italy--History--1268-1492.
Harvard subject headings:
Cities and towns, Medieval--Italy--History.
City-states--Italy--History.
Italy--History--1268-1492.
Princeton subject headings:
Cities and towns, Medieval--Italy--History.
City-states--Italy--History.
Italy--History--1268-1492.