Themistocles, celebrated Athenian general and statesman; rose to political power on the ostracism of Aristides, his rival; persuaded the citizens to form a fleet to secure the command of the sea against Persian invasion; commanded at Salamis, and routed the fleet of Xerxes, and afterwards accomplished the fortification of the city in spite of the opposition of Sparta, but falling in popular favour was ostracised, and took refuge at the court of Artaxerxes of Persia, where he died in high favour with the king (520-453 B.C.).