A New Ruler of the Marwanid Emirate in 401/1010, and Further Considerations of the Legitimising Power of Regicide
˜Dieœ Expedition Taqī ad-Dīn ʿUmars in die Ǧazīra und die Rebellion al-Manṣūr Muḥammads in Ḥarrān während des dritten Kreuzzuges