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Zarateman · CC0
Figure Baghdad thinker

Al-Khwarizmi

780 CE – 850 CE · 70 years

The Baghdad scholar who gave the world algebra and the word algorithm — how a ninth-century polymath at the House of Wisdom synthesised Greek, Indian, and Persian mathematics into a system that would power every equation ever written.

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Al-Khwarizmi on Wikipedia.

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Running at the same time

Records whose own span overlaps this one, found by the same test the canvas draws with. The bar under each card is where it sits inside this one.

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Landmark

Charyn Canyon

3000 BCE – still standing

Polity

Samanid Empire

819 CE – 999 CE

Trade route

Silk Road Southern Branch

200 BCE – 1450 CE

Conflict

Srivijaya Maritime Wars

600 CE – 1288 CE

Figure · Frankish Empire

Charlemagne

742 CE – 814 CE

Landmark

Lake Issyk-Kul

3000 BCE – still standing

Polity

Bashkirs

Attested 800 CE

Figure · India (Kerala to the Himalayas)

Shankara

788 CE – 820 CE

Dated moments inside this span

Events the timeline places between 780 CE and 850 CE.

784 CE Mosque-Cathedral of Córdoba 789 CE Fez 793 CE Viking Invasions 800 CE Mississippian Warfare 800 CE Borobudur 800 CE Venice

And in the rest of the world

Records running through the same years, on the other side of the map.

Borobudur Landmark · Oceania 800 CE – still standing Denmark Polity · Europe Founded 800 CE · attested to 2026 CE Venice–Constantinople Route Trade route · Europe 800 CE – 1600 CE Viking Invasions Conflict · Europe 793 CE – 1066 CE Temples of Bagan Landmark · South Asia 849 CE – still standing Morocco Polity · Africa Founded 789 CE · attested to 2026 CE
Image credits6 pictures from Wikimedia Commons