Agorá travel guide

The Agora was an open "place of assembly" in an ancient Greek city-state. Early in Greek history (900s–700s BCE), free-born male land-owners who were citizens would gather in the agora for military duty or to hear statements of the ruling king or council. Later in Greek history, the agora served as a marketplace where merchants kept stalls or shops to sell their goods under colonnades.
Classical Athens boasted a large agora in the very heart of the city. Under the Athenian dictators Pisistratus and Hippias, the agora was cleared to a rectangular open area of about 600 by 750 yards, bordered with grand public buildings. (...)