For 10 points, name this Abbasid Caliph who ruled from 786-809 and has a name meaning "The Rightly Guided".
According to the contemporary Meadows of Gold this man was reading a poem about death by Abu al-Atiyah at the time of his own death. After victories against the Byzantines, he forced Empress Irene to pay him an enormous tribute. One son of his burnt this man's succession decrees prompting the Battle of Rayy and in its aftermath Al-Ma'mun became caliph. This ruler destroyed the influence of the Barmakids. He may have gained fame in the West after sending a great envoy, complete with technologically advanced clocks and an enormous albino elephant, to the court of Charlemagne. For 10 points, name this Abbasid Caliph who ruled from 786-809 and has a name meaning "The Rightly Guided".
According to the contemporary Meadows of Gold this man was reading a poem about death by Abu al-Atiyah at the time of his own death.
Harun al-Rashid