When did medusa become medusa?

Medusa, originally a beautiful maiden, became the Gorgon we know from Greek mythology after being cursed by the goddess Athena. According to the myth, Poseidon violated Medusa in Athena's temple, leading to Athena's wrath and transformation of Medusa into a creature with snakes for hair and a gaze that turned people to stone. This transformation marked her as a symbol of both beauty and monstrousness, reflecting themes of victimization and power.