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