 The kings of Lydia, according to Plutarch's The Greek Questions, 45, having succeeded Omphale who had received from Herakles Hippolyte's (the queen of the Amazons') axe, carried this axe (called labrys by Lydians) as one of their sacred insignia of office.In the tradition following the Sicilian lyric poet Stesichorus's "Oresteia" Clytemnestra used such a double-edged axe to assist her lover Aegisthus in the killing of Agamemnon (and later, to attempt to kill her son Orestes, as he arrived to avenge his father's death), as depicted on the mixing bowl (calyx krater) with the killing of Agamemnon (Early Classical Period – about 460 B.C.