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

Decades: 820s 830s 840s - 850s - 860s 870s 880s

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

Events

• April 20 - Guntherus becomes Bishop of Cologne.
• Montoku succeeds Nimmyo as emperor of Japan.
• Louis II is crowned co-emperor with his father Lothair I.
• First recorded Viking attack on the Welsh coast.

Births

• 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).
• Harald Harfagre , king of Norway 865-933 (+ 933)

Deaths

• Emperor Nimmyo of Japan
• Ramiro I of Asturias