Events

By Place

Europe

• Prague Castle is founded.
• The Great Summer Army invades England and conquers East Anglia; the buildings destroyed by the Danish invaders include the abbey of Ely and the monastery of Peterborough.
• December 31 — The Danes are defeated by a Saxon army at Englefield, Berkshire. It is the first of a series of battles between Wessex and the Danes.
• Malta is conquered by Arabs from Sicily.
• Treaty of Meerssen: Charles the Bald and Louis the German divide Lotharingia among themselves.
• Borivoj becomes duke of Bohemia.
• Charles the Bald marries Richilde.

By Topic

Religion

• Michael II succeeds Michael I as Patriarch of Alexandria.
• The Autonomous Bulgarian Archbishopric is established.
• February 28 — The Fourth Council of Constantinople ends.

Births

• Al-Farabi, Persian philosopher and scientist
• Zwentibold, King of Lotharingia

Deaths

• November 20 — King Edmund of East Anglia
• al-Bukhari, Persian hadith compiler
• Al-Kindi, philosopher