820

820

__NOTOC__

Events

By Place

Asia

* Tahir, the son of a slave, is rewarded with the governorship of Khurasan for supporting the caliphate. He rules independently of Baghdad, not even mentioning the caliph's name in Friday prayers in recognition of caliphal authority.

Byzantine Empire

* Michael II succeeds Leo V as Byzantine Emperor.

Europe

* The "Historia Brittonum" is written (approximate date).
* Feidlimid mac Cremthanin assumes the kingship of Munster.

By Topic

cience & Technology

* Muslim mathematician Muḥammad ibn Mūsā al-Ḵwārizmī founds algebra.

Births

* Rhodri "Mawr" ('the Great'), ruler of Gwynedd (Wales) (approximate date) (d. 878)
* Photius I, Patriarch of Constantinople (approximate date) (d. 891)

Deaths

* December 24 — Leo V (45), Byzantine Emperor (b. 775) (assassinated)
* Tang Xian Zong (42), emperor of China (b. 778)
* Adi Shankara (32), Hindu sage (n. 788).


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