Abu al-Qasim Ubaydallah ibn Abdallah ibn Khordadbeh (820/825 - 913), commonly known as Ibn Khordadbeh (also spelled Ibn Khurradadhbih; ابن خرددة), was a high-ranking bureaucrat and geographer of Persian descent in the Abbasid Caliphate. He was the director of the caliphate's Bureau of Posts and Intelligence and the author of the earliest surviving Arabic book of administrative geography.Abu al-Qasim Ubaydallah ibn Abdallah ibn Khordadbeh (820/825 - 913), commonly known as Ibn Khordadbeh (also spelled Ibn Khurradadhbih; ابن خرددة), was a high-ranking bureaucrat and geographer of Persian descent in the Abbasid Caliphate. He was the director of the caliphate's Bureau of Posts and Intelligence and the author of the earliest surviving Arabic book of administrative geography....more