http://agathe.gr/guide/stoa_poikile.html
Stoa Poikile Across modern Hadrian Street are the most recent excavations (2003), along the north side of the square. Here have been revealed the remains of another large stoa, identified on the basis ... The stoa was of the Doric order outside, with Ionic columns inside, built mostly of limestone, with marble for the interior column capitals (Figs. 65, 66). ... Cross section of the Stoa Poikile, with Doric columns outside, Ionic within; ca. 470–460 B.C.