In Greek mythology, Tereus was a Thracian king, the son of Ares and the naiad Bistonis. He was the brother of Dryas. Tereus was the husband of the Athenian princess Procne and the father of Itys.
Rubens: Tereus Confronted with the Head of his Son Itys, 1636–38
Io changed into a cow, Mercury cuts of Argus's head
Procne or Progne is a minor figure in Greek and Roman mythology. Traditionally she is an Athenian princess as the elder daughter of a king of Athens named Pandion. Procne was married to the king of Th
Tereus
…Tēreús) was a Thracian king, the son of Ares and the naiad Bistonis. He was the brother of Dryas. Tereus was the husband of the Athenian princess Procne and the father of Itys. When Tereus desired his wife's sister, Philomela, he came to Athens to his father-in-law Pandion to ask for his other daughter…
Athenian wine cup, c. 480 BC, depicting Philomela and Procne preparing to kill Itys (exhibited in the Louvre, Paris).
Furies at Procne and Tereus's wedding night, engraving by Virgil Solis, 1581.
Procne rescues Philomela, 1767 engraving, Getty Research Institute.