840

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

Decades: 790s 800s 810s 820s 830s - 840s - 850s 860s 870s 880s 890s

Years: 835 836 837 838 839 - 840 - 841 842 843 844 845

• After the death of Louis the Pious, his sons Lothair, Charles the Bald and Louis the German fight about the division of the empire.
• Lothair becomes the new western emperor.
• Tang Wu Zong[?] succeeds Tang Wen Zong[?] as emperor of China.
• Foundation of Dublin by Vikings.

Births

• Aed I of Scotland (approximate date)
• Ethelred of Wessex (approximate date)
• Edmund of East Anglia (approximate date)

Deaths

• June 20: Louis the Pious, king of the Franks, Emperor
• Emperor Junna of Japan