The Priestess of Demeter was a priestess of the goddess Demeter, whose duty was to preside over the 428 BCE Olympic Games in the Sanctuary of Olympia in Elis, Greece.
The priestess and the Spartan Judge caught and judged Kallipateira, a woman who tried to watch the games disguised as a man, for it was against the law for women observe the competitions. The price for this transgression was death by being thrown off the mount Kronion.[1]
However, the Spartan misthios Kassandra intervened, and promised to prove that Kallipateira had the right to watch her son Peisirrhodos compete, as she claimed. At the end of her investigation, Kassandra presented the Priestess and the judge with proof of Kallipateira's words, and Kallipateira was acquitted.[1]