* Pnyx is a low and small rocky hill in the center of Athens. From 507 BC, popular assemblies of Athenian citizens were held on the Pnyx. The quorum of the meeting was 5-6 thousand citizens, but could accommodate up to 10 thousand. Pnix was the embodiment of the democratic principle of "isigoria" (equal rights of all citizens to determine policy). The other two principles of Athenian democracy were "isonomy" (equality of all citizens before the law) and "isopolitics" (general equal voting and the right to be elected). After the construction of the Dionysus Theater on the southeastern slope of the Acropolis, the National Assembly chose it as its permanent location. On the eastern slope of the Pnyx is the "Socrates Prison".