Sources available on the historical personality of Abdallah al-Battal consist of legends often written in the mesnevi style, and which may comport historically correct elements or points that support each other, as well as contradictions. For example, he is cited as having participated in his twenties to the Second Arab Siege of Constantinople in 718, and the legends name his Byzantine enemy as "Leon", which could be no other than Leo III the Isaurian, the Emperor during the siege. On the basis of this information, his date of birth is reckoned to be around 690-695 and there is a consensus among historians for accepting 740 as the year of his death, at the Battle of Akroinon. On the other hand, in one story Battal Gazi raids the Maiden's Tower and rides away from Üsküdar, on the city's Asian side, with the Emperor's treasures and daughter, an event that is not confirmed by any historical record.