Abu'l-Qasim Ubaydallah ibn Abdallah ibn Khordadbeh (Persian: ابوالقاسم عبیدالله ابن خردادبه; 820/825–913), commonly known as Ibn Khordadbeh was a high-ranking bureaucrat and geographer of Persian descent in the Abbasid Caliphate. He is the author of the earliest surviving Arabic book of administrative geography.
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