Columbia subject headings:
Cities and towns, Medieval--Italy--Congresses.
City planning--Italy--History--To 1500--Congresses.
Town laws, Medieval--Italy--History--To 1500--Congresses.
Harvard subject headings:
Cities and towns, Medieval--Italy--Congresses.
City planning--Italy--History--To 1500--Congresses.
Town laws, Medieval--Italy--History--To 1500--Congresses.
Princeton subject headings:
Cities and towns, Medieval--Italy--Congresses.
City planning--Italy--History--To 1500--Congresses.
Town laws, Medieval--Italy--History--To 1500--Congresses.