Almansur, Abu Giafar, the 2nd Abbaside caliph and the first of the caliphs to patronise learning; founded Bagdad, and made it the seat of the caliphate; (d. 775).
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Almanach de Gotha * Almansur, Abu Mohammed