870

Millennium:	1st millennium
Centuries:	8th century – 9th century – 10th century
Decades:	840s 850s 860s – 870s – 880s 890s 900s
Years:	867 868 869 – 870 – 871 872 873

870 by topic
Politics
State leaders – Sovereign states
Birth and death categories
Births – Deaths
Establishment and disestablishment categories
Establishments – Disestablishments

Events

Prague Castle is founded.
The Great Summer Army invades England led by Bagsecg 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.