Columbia subject headings:
Cities and towns, Medieval--Italy.
City planning--Italy--History.
Harvard subject headings:
Architecture and society--Italy--History--To 1500--Congresses.
Architecture, Medieval--Italy--Congresses.
Cities and towns, Medieval--Italy--Congresses.
New towns--Italy--History--Congresses.
Power (Social sciences)--Italy--History--To 1500--Congresses.
Princeton subject headings: