Harun al-Rashid becomes the Abbasid caliph upon the death of his brother Al-Hadi
Abū Jaʿfar Hārūn ibn Muḥammad ar-Rashīd, or simply Hārūn ibn al-Mahdī (763 or 766 – 24 March 809), famously known as Hārūn al-Rashīd, was the fifth Abbasid caliph of the Abbasid Caliphate, reigning...