From Connolly & Dodge, The Ancient City
This peplos was in all probability not placed the colossal statue of Athena in the Parthenon. It has been suggested that it was hung in the temple. First, it would have been extremely difficult, if not impossible, to put the peplos on such 39 ft. high statue. Also, the golden peplos that had been fitted by the sculptor to the statue was one of its important features and it would have been strange to cover it up with a wool garment.
Colossal Statue of Athena Parthenos
The first mention of the colossal peplos in a literary source is in a play (Macedonians) by the comic poet Strattis (late 5th/early 4th century) . He has one of his characters say:
Countless men using a crank draw this peplos up with ropes to the top like the mast of a sail.The fact that no earlier extant source mentions the huge peplos (or the shipcart) could explain why there is no depiction of this peplos or the shipcart on the frieze of the Parthenon, which was completed in 432 BC.