The correct answer is "Athens, Greece."
The civilization in which these cities and city-states were famous was in the Athens civilization.
In ancient Greek times, Athens was the city-state that dominated other city-states until the Peloponnesian War in which Athens was defeated by Sparta. Athens was a political city that also was the place for arts and philosophy in Greece. Athens is also the birthplace of democracy and of great philosophers such as Socrates, Aristotle, and Plato.
