Zulqarnain and Cyrus the great in Koranic viewpoint

This article examines the story of Zulqarnain in Koranic and historical texts viewpoints. The Holy Koran has narrated this story of Zulqarnain for its Arab readers.Although the Holy Koran always tries to give advices to its readers, when telling stories and does not go to the details. The question that arises is, who is Zulqarnain and whatplace has been the territory of his government? The historians can not furnish us clear information in this context, but by considering the information that Koran givesus, and also the information given by the ancient history, we can arrive to safe conclusions.