Alexander the Great in the Quran called them the Caspian Gates. Twenty and two Kings did I shut up therein. These pseudepigraphic letters from Alexander to his mother Olympias and his tutor Aristotle, describing his marvellous adventures at the end of the World, date back to the original Greek recension α written in the 4th century in Alexandria. The letters are "the literary expression of a living popular tradition" that had been evolving for at least three centuries before the Quran was written. Several historical figures, both Muslim and Christian, searched for Alexander's Gate and several different identifications were made with actual walls. During the Middle
Alexander the Great in the Quran about Alexander the Great also came to the conclusion that Dhul-Qarnayn is an ancient epithet for Alexander the Great. Edwards says, Alexander's association with two horns and with the building of the gate against Gog and Magog occurs much earlier than the Quran and persists in the beliefs of all three of these religions [Judaism, Christianity and Islam]. The denial of Alexander's identity as Dhul-Qarnain is the denial of a common heritage shared by the cultures which shape the modern world—both in the east and the west. The popularity of the legend of Alexander the Great proves that these cultures