Al-Ma'mun
An Abbasid caliph who turned Baghdad into the world's intellectual capital by championing science, philosophy, and rational debate.
Born 768 (age 1258)·Abbasid Caliph from 813 to 833·Birthday: September 14
Biography
The seventh Abbasid caliph, al-Ma'mun, presided over the dazzling apex of the Islamic Golden Age. His reign was born from a brutal civil war, but once secure, he pursued a radical project: the systematic translation of the world's knowledge. He established the Bayt al-Hikma, or House of Wisdom, in Baghdad, a library and institute that attracted scholars of all faiths to render Greek, Persian, and Indian texts into Arabic. Al-Ma'mun didn't just collect books; he actively sponsored debates between theologians and scientists, forcefully promoting the rationalist Mu'tazili school of thought. This institutional patronage led to monumental advances in algebra, astronomy, and medicine, preserving classical learning and setting the stage for centuries of innovation. His legacy is a testament to the power of state-sponsored inquiry and open intellectual exchange.
#1 When Al-Ma'mun Was Born
The biggest hits of 768
Al-Ma'mun's Life & Times
The world at every milestone
768Born
773Started school
781Became a teenager
784Could drive
786Could vote
789Turned 21
798Turned 30
808Turned 40
818Turned 50
828Turned 60
838Turned 70
848Turned 80
2026Age 1258 today
Gas: $3.91/galPresident: Donald Trump
Key Achievements
- Founded the House of Wisdom in Baghdad, a premier center for translation and scholarly research during the Islamic Golden Age.
- Instituted the Mihna, an inquisition promoting the rationalist Mu'tazili theology within the Islamic scholarly community.
- Sponsored the work of mathematician al-Khwarizmi, whose foundational text gave the world the word 'algebra.'
Did You Know?
He reportedly had a dream where Aristotle appeared to him, which he interpreted as a mandate to pursue Greek philosophy.
Al-Ma'mun ordered the construction of an observatory in Baghdad to verify astronomical data from Ptolemy's Almagest.
He attempted to measure the circumference of the Earth by commissioning a geographic project in the Syrian desert.
“The ink of a scholar is more sacred than the blood of a martyr.”
