836
| Years: 832 833 834 835 - 836 - 837 838 839 840 | |
| Decades: 800s 810s 820s - 830s - 840s 850s 860s | |
| Centuries: 8th century - 9th century - 10th century | |
Events
- Abbasid caliph al-Mutasim establishes new capital at Samarra, Iraq.
- Egbert of Wessex is defeated by the Danes.
- John VII Grammaticus succeeds Antony I as patriarch of Constantinople.
- Oldest known mentioning of the city of Soest.
- Thabit ibn Kurrah, Arabian astronomer
- Fujiwara no Mototsune, Japanese regent
- Ethelbert, king of Wessex
- Constantine I, king of Scotland