Linked from
The 17 pages that link to Al-Ma'mun, each with the reason it gives.
MihnaRelated: He ordered provincial officials to examine scholars on the Quran's createdness.
Al-KindiRelated: Al-Kindi’s intellectual world grew from Abbasid court patronage of Greek learning.
Tahirid dynastyRelated: He rewarded Tahir ibn Husayn with the governorship of Khorasan.
Ali al-RidaRelated: His decision made Ali al-Rida a central figure in Abbasid dynastic politics.
Muhammad al-JawadRelated: He brought al-Jawad to Baghdad and arranged his marriage to his daughter.
Al-Mu'tasimRelated: Al-Ma'mun’s death in 833 brought Al-Mu'tasim to the caliphate.