Events

By place

Asia

• Abbasid caliph al-Mutasim establishes a new capital at Samarra, Iraq.

Europe

• Egbert of Wessex is defeated by the Danes.

• Presian succeeds Malamir as Khan of Bulgaria.

• Oldest known mention of the city of Soest, Germany.

• Petrus Tradonicus Pola appointed Roman consul and duke of Venice.

By topic

Art

• The construction of Mosque of Uqba, Kairouan, Tunisia, begins.

Religion

• John VII Grammaticus succeeds Antony I as Patriarch of Constantinople.

Births

• Thabit ibn Kurrah, Arabian astronomer

• Fujiwara no Mototsune, Japanese regent (d. 891)

• Ethelbert of Wessex

• Wei Zhuang

Deaths