|Summary:||Stoa; along the northern wall of the Sanctuary of Poseidon at the western end.|
|Date:||ca. 425 BC - 400 BC|
38.06 m x 10.25 m; Doric inner column diameter: 0.6 m; intercolumniation: 5.23 m.
Two-aisled stoa opening south with a Doric inner colonnade of 6 unfluted columns, outer colonnade of 8 or 9 columns between return walls at the front.
Probably constructed somewhat later than the Propylon. Coulton does not propose exterior columns.