Decades: 810s 820s 830s 840s 850s - 860s - 870s 880s 890s 900s 910s

Years: 859 860 861 862 863 - 864 - 865 866 867 868 869

• Khan Boris I of Bulgaria is baptized an Orthodox Christian.
• Louis II marches against Rome, but getting ill decides on making peace with the Pope.
• Orso I Participazio becomes Doge of Venice.

• Abu Bakr Mohammad Ibn Zakariya al-Razi, Persian polymath

• Halfdan the Black, King of parts of Norway