... not with white, but with black tiles. In a circle round the black stone runs a raised rim of Parian marble, to keep in the olive oil that is poured out. For olive oil is beneficial to the image at Olympia , and it is olive oil that keeps the ivory from being harmed by the marshiness of the Altis. On the Athenian Acropolis the ivory of the image they call the Maiden is benefited, not by olive oil, but ...