Panaenus (), brother or nephew of Phidias, was an ancient Greek painter who worked in conjunction with Polygnotus and Micon at Athens.Harry Thurston Peck, Harpers Dictionary of Classical Antiquities (1898), Panaenus
The painting of the Battle of Marathon in the Stoa Poikile is ascribed to Panaenus and to Micon and Polygnotus, who may have assisted him.Smith, William (ed.) 1870, Dictionary of Greek and Roman Biography and Mythology. Little & Brown, Boston & London (p. 466, entry Polygnotus).
He also painted the marble sides of the throne of the statue of Zeus erected by Phidias at Olympia.
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