Columbia subject headings:
Harvard subject headings:
Cities and towns, Ancient--Congresses.
Cities and towns--Greece--Congresses.
Cities and towns--Rome--Congresses.
City planning--History--Congresses.
Civilization, Classical--Congresses
Princeton subject headings:
Cities and towns, Ancient--Congresses.
Cities and towns--Greece--Congresses.
Cities and towns--Rome--Congresses.
City planning--History--Congresses.
Civilization, Classical--Congresses.