850

Centuries: 8th century - 9th century - 10th century

Decades: 800s 810s 820s 830s 840s - 850s - 860s 870s 880s 890s 900s

Years: 845 846 847 848 849 - 850 - 851 852 853 854 855

• April 20 - Guntherus becomes Bishop of Cologne.

• Louis II is crowned co-emperor with his father Lothair I.

• Emperor Seiwa of Japan, 56th imperial ruler of Japan (+ 881).
• Al-Batani, Arab prince and astronomer (approximate date) (+ 929).
• Arnulf of Carinthia, King of the East Franks (+ 899).

• Emperor Nimmyo of Japan
• Ramiro I of Asturias