817
| Years: 813 814 815 816 - 817 - 818 819 820 821 | |
| Decades: 780s 790s 800s - 810s - 820s 830s 840s | |
| Centuries: 8th century - 9th century - 10th century | |
Events
- Louis the Pious divides his empire among his sons. Louis the German becomes king of East Francia, Lothar I becomes co-emperor.
- End of the Bulgarian siege of Constantinople.
- Council of Aachen
Deaths
- Stephen V (June 816 - January 817), succeeded by Pope Paschal I
- Theophanes the Chronographer, Byzantine historian