The Echo Stoa is a colonnaded walkway located within the sanctuary of Zeus at Olympia, Greece. The structure derives its name from a remarkable acoustic phenomenon: sounds uttered at one end can be heard clearly at the other, a result of its precise architectural design [1]. Excavated and preserved by the German Archaeological Institute at Athens, the stoa once served as a space for commercial trade, religious gatherings, and public meetings typical of such structures in ancient Greek sanctuaries [1]. The sanctuary of Zeus at Olympia, where the Echo Stoa is situated, was Greece's most important religious center, second only to Delphi [1].
Echo Stoa

| Type | Megalithic structures |
|---|---|
| Period | 1 - 500 AD |
| Country | Greece |
| Coordinates | 37.6386° N, 21.6317° E |
Greece