Iktinos in Wikipedia

Iktinos (in Latin Ictinus) was an architect active in the mid 5th century BC.[1][2] Ancient sources identify Iktinos and Kallikrates as co-architects of the Parthenon. Pausanias identifies Iktinos as architect of the Temple of Apollo at Bassae. That temple was Doric on the exterior, Ionic on the interior, and incorporated a Corinthian column, the earliest known, at the center rear of the cella. Sources also identify Iktinos as architect of the Telesterion at Eleusis, a gigantic hall used in the Eleusinian Mysteries.