In the play, The Bacchae, written by Euripides, Dionysus returns to his birthplace, Thebes, which is ruled by his cousin Pentheus. Dionysus wants to exact revenge on Pentheus and the women of Thebes (his aunts Agave, Ino and Autonoe) for not believing his mother Semele's claims of being impregnated by Zeus, and for denying Dionysus's divinity (and therefore not worshiping him).