Head of IoIo; in Greek mythology; daughter of Inachus (the river god of Argos) and the Oceanid Melia. Under the name of Callithyia; Io was regarded as the first priestess of Hera; the wife of Zeus. Zeus fell in love with her and; to protect her from the wrath of Hera; changed her into a white heifer. But Io has to escape and goes away to Egypt. Io will become the Egyptian goddess Isis.1st century ADMarbleNaples. Museo Archeologico Nazionale2018