Bouleuterion of Ancient Olympia settled
580 BCE.
Shown on the map at 37.637°, 21.631°.
The Bouleuterion (Council House) of Ancient Olympia was a building inside the archaeological site of Olympia. A bouleuterion was an assembly house for local legislatures and other meetings. Building complex comprising two main buildings, a square room, and a stoa. The edifices were erected south of the Temple of Zeus and date back to the 6th - 4th Century BC.
Text from the Wikipedia article Bouleuterion of Ancient Olympia, licensed CC BY-SA 4.0.