870

Events 
 By place 

 Europe 
 Prague Castle is founded.
 The Great Summer Army invades England.  It is led by Bagsecg.  They conquers East Anglia.
 August 8 – Treaty of Meerssen: Charles the Bald and Louis the German divide Lotharingia among themselves.
 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.
 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 made.
 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

Category:870