The Gorgon' head

King Acrisius of Argos has a stunningly beautiful daughter but wants a son, so he prays to the gods. Apollo tells him not only that Acrisius will never have a son, but also that the son of his daughter will kill him. The only way to fully prevent this prophecy would be to kill his daughter, Danae, but Acrisius fears what the gods would do to him. Instead, he imprisons Danae in a bronze house without a roof and guards her carefully.