known as Cyrus the Great 
born c. 585, Media or Persis
died c. 529, Asia
 

Conqueror who founded the Achaemenian Empire (see Achaemenian dynasty).

The grandson of Cyrus I (fl. late 7th century BC), he came to power by overthrowing his maternal grandfather, the king of the Medes. The empire he developed was thenceforth centered on Persia and included Media, Ionia, Lydia, Mesopotamia, Syria, and Palestine. Cyrus conquered by diplomacy as well as by force. The subject of a rich legend in Persia and Greece (recorded by Xenophon and others), he was called the father of his people. He appears in the Bible as the liberator of the Jews held captive in Babylon. He died battling nomads in Central Asia. His legacy is the founding not only of an empire but of a culture and civilization that continued to expand after his death and lasted for two centuries. He exerted a strong influence on the Greeks and Alexander the Great. Awarded heroic qualities in legend, he has long been revered by Persians almost as a religious figure. In 1971 Iran celebrated the 2,500th anniversary of his founding of the monarchy.
 

source:

http://www.britannica.com/ebc/article-9362128