Plutarch's Life of Pericles, 13.4-9, informs us "the man who directed all the projects and was overseer [episkopos] for him [Pericles] was Phidias.. Almost everything was under his supervision, and, as we have said, he was in charge, owing to his friendship with Perikles, of all the other artists" [REF].
The marble was quarried from Mt. Pentelikon and transported 19 km to the acropolis of Athens.