Polymestor, King of Thrace is the main antagonist of the Eurpiedes' greek tragedy Hecuba. During the Trojan War, King Priam was frightened for his youngest son Polydorus's safety since Polydorus could not fight for himself. Priam sent the child, along with gifts of jewelry and gold, to the court of King Polymestor to keep him away from the fighting. After Troy fell, Polymestor betrayed Priam and threw Polydorus into the ocean in order to keep the treasure for himself.