Columbia subject headings:
Cities and towns, Ancient--Italy--Congresses.
Cities and towns, Medieval--Italy--Congresses.
Harvard subject headings:
Archaeology, Medieval--Italy--Congresses.
Cities and towns, Ancient--Italy--Congresses.
Cities and towns, Medieval--Italy--Congresses.
Princeton subject headings:
Cities and towns, Ancient--Italy--Congresses.
Cities and towns, Medieval--Italy--Congresses.