http://agathe.gr/democracy/the_agora_and_pnyx.html
The Agora and Pnyx Center of public activity, the Agora was a large open square where all the citizens could assemble (2, 3). It was used for a variety of functions: markets, religious processions, athletic ... The Agora and Pnyx Center of public activity, the Agora was a large open square where all the citizens could assemble (2, 3). ... It was on the Pnyx (5) that policies initiated by magistrates and committees in the offices of the Agora were submitted to the Athenian citizens. ... Speaker’s platform (bema) on the Pnyx, fourth century B.C.