Dating from the 4th century BC, the South Stoa was located at the outer side of the Altis, south side of the Vouleutirion and east of Leonidaion. It measured 80m. long. It had an outer colonnade of Doric order and an inner colonnade of Corinthian order while in the middle of there was a kind of platform, in the side of the river Alpheus. Pausanias reports the existence of proedriae, a location from which the officials and the priesthood could observe the procession and the South Stoa is most likely identified with this place.