This treaty is placed about the 50th Olympiad, or 580 BCE, since it belongs to a time when the Eleians exercised an undisputed supremacy over the dependent districts of Pisatis and Triphylia; and the Heraeans consequently were anxious to avail themselves of their support.
[3] In consequence of their close connection with Sparta, the Heraeans incurred the hostility of the other Arcadians, who laid waste their territory in 370 BCE.
The remains of Heraea are visible on a hill west of the village of Agios Ioannis (St. John),[10] bounded on either side by a ravine, and sloping down towards the river.
These ruins extend along the summit of the hill and the slope towards the river; but they are inconsiderable, and have for the most part been cleared away in consequence of the fertility of the land.
The famous Tabula Peutingeriana shows a road system connecting Heraia with ancient Olympia, Melaneae and Megalopolis.
[13] It is located on the Alpheios river near Agios Ioannis, a few miles south-west of the modern village of Loutra Iraias, in the municipality of Gortynia in the western Peloponnese, Greece.
A famous statue of Pan with the face of Apollo, created by Polykleitos, was located in Heraia and can be seen stamped on gold coins from the region dating to the 4th century BCE.