850 deaths

Muhammad ibn Musa al-Khwarizmi, or simply al-Khwarizmi () was a mathematician active during the Islamic Golden Age, who produced Arabic-language works in mathematics, astronomy, and geography. Around 820, he worked at the House of Wisdom in Baghdad, the contemporary capital city of the Abbasid Caliphate. One of the most prominent scholars of the period, his works were widely influential on later authors, both in the Islamic world and Europe.

Muslim Arab poet of Abbasid era (died 850)

Emperor of Japan

King of Asturias

Arab musician of Persian origin (767/772 – 850)

Chinese Hongzhou school monk

Count of Toulouse and Barcelona (826–850)

Amalarius (c. 775–c. 850) was a Frankish prelate and courtier, temporary bishop of Trier (812–13) and Lyon (835–38), and an accomplished liturgist. He was close to Charlemagne and a partisan of his successor, Louis the Pious, throughout the latter's tumultuous reign.

Vasugupta ( – 850 CE) was the author of the Shiva Sutras, an important text of the Advaita tradition of Kashmir Shaivism, also called Trika (sometimes called Trika Yoga).

Chinese writer and chancellor (787-850)

Frankish bishop and historian

Saint Perfectus (Santo Perfecto) (died 18 April 850) was one of the Martyrs of Córdoba whose martyrdom was recorded by Saint Eulogius in the Memoriale sanctorum.

Japanese empress (786-850)

chief of security in Baghdad