In Greek mythology, a king of the Ethiopians. The son of Tithonus (of the Trojan royal house) and Eos (Dawn), he fought bravely for his uncle Priam against the Greeks, and was slain by Achilles. Moved by the tears of Eos, Zeus granted him immortality. His companions, changed into birds, came every year to fight and lament over his grave. In Egypt his name was connected with the colossal stone statues of Amenhotep III near Thebes; the harplike sounds these statues emitted when touched by the rays of the rising sun were believed to be the voice of Memnon responding to the greeting of his mother, Eos.
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