|Centuries:||8th century – 9th century – 10th century|
|Decades:||840s 850s 860s – 870s – 880s 890s 900s|
|Years:||867 868 869 – 870 – 871 872 873|
- 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.