At the western side of the Acropolis, lies the rock of the Pnyx. Due to its unique morphology and size, the Pnyx was selected as the seat of the Ecclesia and the area of assembly for Athenian citizens.

It is believed that official functions at the Pnyx began sometime in the 6th century, during the age of the Reforms of Cleisthenes. In the New Testament, the Acts of the Apostles mention the Apostle Paul’s Homily to the Athenians on the Pnyx in 51 AC, which introduced the Christian religion to the Greeks.