Columbia subject headings:
Cities and towns, Ancient--Greece--Congresses.
Cities and towns--Rome--Congresses.
Greece--Civilization--Congresses.
Migration, Internal--Greece--Congresses.
Migration, Internal--Rome--Congresses.
Rome--Civilization--Congresses.
Harvard subject headings:
Cities and towns, Ancient--Greece--Congresses.
Cities and towns--Rome--Congresses.
Greece--Civilization--Congresses.
Migration, Internal--Greece--Congresses.
Migration, Internal--Rome--Congresses.
Rome--Civilization--Congresses.
Princeton subject headings:
Cities and towns, Ancient--Greece--Congresses.
Cities and towns--Rome--Congresses.
Greece--Civilization--Congresses.
Migration, Internal--Greece--Congresses.
Migration, Internal--Rome--Congresses.
Rome--Civilization--Congresses.