Archaeological Ruins of the Telesterion at Eleusis

Wikimedia Commons

The ruins of the Telesterion (Hall of Initiation) at the archaeological site of Eleusis. The visible remains show the rock-cut foundations and poros stone elements of the successive building phases, from the Peisistratean era (c. 540 BCE) through the Roman period. The building measured approximately 51.5 meters per side. Photo by TimeTravelRome.