“The floor in front of the image was paved with black tiles and surrounded by a raised rim of marble to contain the oil. This reservoir acted as a reflecting pool which doubled the apparent height of the statue”
(Pausanias, Description of Greece, Book V, 11)

“The statue gives the impression that if Zeus arose and stood erect he would unroof the temple.”
(Strabo, BCE 17, Geographica, Book VIII, 3)

“The throne featured painted figures and wrought images and was decorated with gold, precious stones, ebony, and ivory.”
(Pausanias, Description of Greece, Book V, 11)