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Arcadius was Roman emperor from 383 to his death in 408. He was the eldest son of the Augustus Theodosius I (r. 379–395) and his first wife Aelia Flaccilla, and the brother of Honorius (r. 393–423). Arcadius ruled the eastern half of the empire from 395, when their father died, while Honorius ruled the west. A weak ruler, his reign was dominated by a series of powerful ministers and by his wife, Aelia Eudoxia.