This violation of the sanctity of her temple provoked Athena, and she changed the beautiful locks of Medusa, which had inspired the love of Poseidon, into ghastly and living serpents, as a punishment for the desecration of that sanctuary, where only worship and incense should have been offered.

Medusa, by Caravaggio (1595)

   “Stheno, this is a tragedy that has consequences beyond these deaths. Poseidon’s head priest of his Athenian temple has been killed on his own feast day. Rape or not, no priestess of Athena can have ever been with a man, or even a god. You must leave as quickly as you can."

~Excerpt from Medusa