Altaïr Ibn-La'Ahad (1165 – 1257) was a Syrian-born member of the Levantine Brotherhood of Assassins and served as theirMentor from 1191 until his death in 1257. During his tenure as Mentor, Altaïr made several discoveries and inventions that greatly helped the Order's progression. His leadership saw to the spread of the Assassins' influence in the Old World.