Cyrus (560‒529 B.C.)

Cyrus, surnamed the Great, or the Elder, the founder of the Persian empire; began his conquests by overthrowing his grandfather Astyages, king of the Medes; subdued Croesus, king of Lydia; laid siege to Babylon and took it, and finished by being master of all Western Asia; was a prince of great energy and generosity, and left the nations he subjected and rendered tributary free in the observances of their religions and the maintenance of their institutions; this is the story of the historians, but it has since been considerably modified by study of the ancient monuments (560‒529 B.C.).

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)