???????: ??? ???????? ?????? ??????? ??????? ????????? ????????? ?????????? ????????? ?????? ??????? ??????? ?Gold dinar of Abbasid caliph Al-Mansur (r. 754–775) the founder of Baghdad, patron of art and science The capital was moved from Damascus to Baghdad, due to the worth put by the Abbasids upon eastern affairs in Persia and Transoxania.[129