Greek mythology tells us about Tiresias, a blind prophet of Apollo, who was famous for his clairvoyance and for being changed into a woman for seven years. He was in Thebes for seven generations, giving advice to Cadmus, the first king of Thebes, and seeing the story of King Laius and his son Oedipus unfold. After the Seven Against Thebes expedition, in which Polynices (son of Oedipus) and six others attacked Thebes, Tiresias died. Pliny the Elder even said that Tiresias invented augury.

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