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   Histiaeus (Ancient Greek: Ἱστιαῖος, died 493 BC), the son of Lysagoras, was a Greek ruler of Miletus in the late 6th century BC. Histiaeus was tyrant of Miletus under Darius I, king of Persia, who had subjugated Miletus and the other Ionian states in Asia Minor, and who generally appointed Greeks as tyrants to rule the Greek cities of Ionia in his territory.