Al-Ma'mun

The third major Islamic caliphate (750–1258 CE), centered in Baghdad. It presided over the Islamic Golden Age, with landmark advances in science, philosophy, literature, and the arts, forging a cosmopolitan empire that blended Greek, Persian, Indian, and Arab traditions.

Al-Ma'mun (r. 813-833 CE) was the seventh Abbasid caliph and one of the most intellectually accomplished rulers in Islamic history. His reign marked the peak of the translation movement and the flourishing of the House of Wisdom in Baghdad, making him a central figure in the Islamic Golden Age.

The House of Wisdom (Bayt al-Hikma) was the premier intellectual institution of the Islamic Golden Age, established in Baghdad under the Abbasid caliphs. For over a century it was the world's leading center for translation, research, and scholarship across the sciences.

The Mihna (833–848 CE) was a fifteen-year inquisition begun by Caliph al-Ma'mun to enforce the Mu'tazilite doctrine that the Quran was created. Its failure, symbolized by Ahmad ibn Hanbal's resistance, established the independence of religious scholarship from political authority.