Al-Ma'mun

Abbasid caliph (786–833, r. 813–833)

  • Fame59.5
  • Momentum11.4
  • Wikipedia21.1K
Source-basedRising
Lived 786–833, aged 47
WritersWriter / Author
  • Wikipedia
    57 languages
    Cross-language footprint
  • Era
    786–833
    Aged 47
Summary
Updated 2026-08-18

The Abbasid caliph who turned Baghdad into the intellectual engine of the medieval world. Under al-Ma'mun's twenty-year reign, Greek philosophy poured into Arabic, al-Khwarizmi published the foundational text of algebra, and the rational theology of Mu'tazilism found its most powerful patron — even as that patronage hardened into coercion.

Biography

About

Born in September 786, Abd Allāh ibn Hārūn became the seventh Abbasid caliph in 813 after a civil war against his half-brother al-Amin. He spent much of his reign on military campaigns, navigating cycles of war and diplomacy with the Byzantine Empire while consolidating power at home. But his legacy rests on what he built in Baghdad: he championed the Graeco-Arabic translation movement, presided over a flourishing of science and learning, and oversaw the publication of al-Khwarizmi's work on algebra. His commitment to Mu'tazilism — a rationalist strain of Islamic theology — eventually turned c…

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Score breakdown

The six component signals behind the Fame score, and their ranks across the leaderboards.

Fame
Rising
59.5
Composite of search demand, mentions, audience & graph footprint.
Score components
Momentum11.4
Historical24.2
Now attention47.2
Source confidence60.0
Completeness60.0
Global rank
Country rank
Category rank
Receipts

Sources

  • Wikidata
    wikidata · wikidata.org
    High confidence
  • Wikipedia
    wikipedia · en.wikipedia.org
    High confidence
  • Pantheon 2.0
    database · pantheon.world
    High confidence