Medusa

Medusa was one of the most beautiful women in all of Greece.  She was a temple virgin of Aphrodite; but the hapless maid was seduced by the god Apollo and gave in to his amorous advances while performing her duties in Aphrodite's temple.  For her impropriety the angry goddess cursed her so that she became a gorgon so hideous that should anyone look upon her they would be turned into stone forever.