Not linked to in the Wiki article for some reason.
In Greek mythology, Tiresias (/taɪˈriːsiəs/; Greek: Τειρεσίας, Teiresias) was a blind prophet of Apollo in Thebes, famous for clairvoyance and for being transformed into a woman for seven years. He was the son of the shepherd Everes and the nymph Chariclo.[1] Tiresias participated fully in seven generations in Thebes, beginning as advisor to Cadmus himself.