Al-Khwarizmi
c. 780 – 850 · 70 years · Baghdad · Middle East
Scholar of Baghdad's House of Wisdom whose treatise gave algebra its name; the word 'algorithm' comes from his name.
Wikipedia (Russian) · Wikipedia (English) · 8th century
Portrait: Michel Bakni · Public domain · Wikimedia Commons
Contemporaries around the world
Europe
- Charlemagne — King of the Franks, Emperor, 32 years older
- Louis the Pious — Charlemagne's son, under whom his empire began to break up, 2 years older
- Charles the Bald — first king of West Francia, the future France, 43 years younger
Eastern Europe & Russia
- Rurik — Varangian prince, founder of the Rurik dynasty, 50 years younger
Middle East
- Harun al-Rashid — Abbasid caliph, 14 years older
Asia
- Emperor Kanmu — emperor who founded Heian-kyō, the future Kyoto, 43 years older
The world in their lifetime
- 793 Viking raid on Lindisfarne — aged 13, Europe
- 800 Coronation of Charlemagne — aged 20, Europe
- c. 800–950 Drought and the Classic Maya collapse — aged 20, Americas
- 802 Founding of the Khmer Empire — aged 22, Asia
- 843 Treaty of Verdun — aged 63, Europe