Alexander the Great in the Quran rhetorical type depending on the Cleitarchus tradition, and with this he amalgamated a collection of imaginary letters derived from an "Epistolary Romance of Alexander" written in the first century B.C. He also included two long letters from Alexander to his mother Olympias and his tutor Aristotle describing his marvellous adventures in India and at the end of the World. These are the literary expression of a living popular tradition and as such are the most remarkable and interesting part of the work. The Greek variants of the "Alexander romance" continued to evolve until, in the 4th century, the Greek legend
Alexander the Great in the Quran name Caspian Gates originally applied to the narrow region at the southeast corner of the Caspian Sea, through which Alexander actually marched in the pursuit of Bessus in 329 BC, although he did not stop to fortify it. It was transferred to the passes through the Caucasus, on the other side of the Caspian, by the more fanciful historians of Alexander. The Jewish historian Flavius Josephus (37–100 AD) mentions that: ...a nation of the Alans, whom we have previously mentioned elsewhere as being Scythians ... travelled through a passage which King Alexander [the Great] shut up with iron gates. Josephus