811
| Years: 807 808 809 810 - 811 - 812 813 814 815 | |
| Decades: 780s 790s 800s - 810s - 820s 830s 840s | |
| Centuries: 8th century - 9th century - 10th century | |
Events
- July 26 - Battle of Pliska: Nicephorus I is defeated by the Bulgar khan Krum, and is succeeded by Stauracius as Byzantine emperor.
- October 1 - Michael I declared Byzantine emperor. Stauracius retires to a monastery.
Deaths
- July 26 - Nicephorus I, Byzantine emperor (slain in battle)