Ecclesia (ancient Greece)

Constitution of the Athenians, 4th century BC. The ecclesia is represented by the small blue box in the top center of the image. This diagram is based on Aristotle's Constitution of the Athenians.
The ekklesia in Athens convened on a hill called the Pnyx

The ecclesia or ekklesia (Greek: ἐκκλησία) was the assembly of the citizens in city-states of ancient Greece.