Laomedon

Laomedon was King of Troy. He was the son of King Ilus. With his wife Leucippe, he had several children, including Priam, Hesione and Tithonus.

The Walls of Troy
Poseidon and Apollo, having offended Zeus, were sent to serve Laomedon. He had them build huge walls around the city. In this they were aided by Aeacus, king of Aegina. When they had finished, three serpents tried to destroy the walls. The two attacking Poseidon and Apollo's sections died instantly but one forced its way through Aeacus' part. Apollo prophesised Troy could only be breached by the Aeacidae; Aeacus' descendants.

Laomedon promised to reward them well for the task, a promise he then refused to fulfill. In vengeance, before the Trojan War, Poseidon sent a sea monster to attack Troy and Apollo sent a pestilence. Laomedon planned on sacrificing his daughter Hesione to Poseidon in the hope of appeasing him. Heracles (along with Telamon, son of Atreus) rescued her at the last minute and killed the monster. Laomedon had promised them the magic horses of his grandfather, King Tros, as a reward for their deeds, but when he broke his word, Heracles and his allies took vengeance by putting Troy to siege, killing Laomedon and all his sons save Podarces, who saved his own life by giving Heracles a golden veil Hesione had made (and therefore was afterwards called Priam, from priamai 'to buy'). Telamon took Hesione as a war prize.