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
Arts, history, and science
Archaeology Architecture Art Literature Poetry Music Science
Countries
Lists of leaders
State leaders Colonial governors Religious leaders
Birth and death categories
Births Deaths
Establishments and disestablishments categories
Establishments Disestablishments
Works category
Works

870 (DCCCLXX) was a common year starting on Sunday of the Julian calendar, the 870th year of the Common Era (CE) and Anno Domini (AD) designations, the 870th year of the 1st millennium, the 70th year of the 9th century, and the 1st year of the 870s decade. As of the start of 870, the Gregorian calendar was 4 days ahead of the Julian calendar, which was the dominant calendar of the time.

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.

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

870 Media

• 

  Division after the Treaty of Meerssen (870)