Columbia subject headings:
Cities and towns, Ancient--Congresses.
Cities and towns, Medieval--Congresses.
Cities and towns--Congresses.
Harvard subject headings:
Princeton subject headings:
Architecture and state--History--Congresses.
Cities and towns--History--Congresses.
City and town life--History--Congresses.
City planning--History--Congresses.
Sociology, Urban--History--Congresses.