Magnificent, wild, and uncontrollable, they belonged to the giant Diomedes (not to be confused with Diomedes, son of Tydeus), king of Thrace, a son of Ares and Cyrene who lived on the shores of the Black Sea.
His most important works are on red-ground neck amphorae; they include a depiction of the killing of the nude Ismene by Tydeus on his name vase, which is now on display in the Louvre.