The story of Dhul-Qarnayn (in Arabic ذو القرنين, literally "The Two-Horned One"; also transliterated as Zul-Qarnain or Zulqarnain), is mentioned in the Quran. It has long been recognised in modern scholarship that the story of Dhul-Qarnayn has strong similarities with the Syriac Legend of Alexander the Great. According to this legend, Alexander travelled to the ends of the world then built a wall in the Caucasus mountains to keep Gog and Magog out of civilized lands (the latter element is found several centuries earlier in Flavius Josephus). Several argue that the form of this narrative in the Syriac Alexander Legend (known as the Neṣḥānā) dates to between 629 and 636 CE and so is not the source for the Qur'anic narrative based on the view held by many Western and Muslim scholars that Surah 18 belongs to the second Meccan Period (615–619). The Syriac Legend of Alexander has however received a range of dates by different scholars, from a latest date of 630 (close to Muhammad's death) to an earlier version inferred to have existed in the 6th century CE. Sidney Griffith argues that the simple storyline found in the Syriac Alexander Legend (and the slightly later metrical homily or Alexander poem) "would most likely have been current orally well before the composition of either of the Syriac texts in writing" and it is possible that it was this orally circulating version of the account which was recollected in the Islamic milieu. The majority of modern researchers of the Qur'an as well as Islamic commentators identify Dhul Qarnayn as Alexander the Great. The legendary Alexander Alexander in legend and romance Alexander the Great was an immensely popular figure in the classical and post-classical cultures of the Mediterranean and Middle East. Almost immediately after his death in 323 BC a body of legend began to accumulate about his exploits and life which, over the centuries, became increasingly fantastic as well as allegorical. Collectively this tradition is called the Alexander romance and some recensions feature such vivid episodes as Alexander ascending through the air to Paradise, journeying to the bottom of the sea in a glass bubble, and journeying through the Land of Darkness in search of the Water of Life (Fountain of Youth). The earliest Greek manuscripts of the Alexander romance, as they have survived, indicate that it was composed at Alexandria in the 3rd century. The original text was lost