803
| Years: 799 800 801 802 - 803 - 804 805 806 807 | |
| Decades: 770s 780s 790s - 800s - 810s 820s 830s | |
| Centuries: 8th century - 9th century - 10th century | |
Events
- Nicephorus I and Charlemagne settle their imperial boundaries.
- Venice recognized as independent by Byzantine Empire.
- Du Mu, Chinese poet
- August 9 - Former Byzantine Emperor Irene (exiled to Lesbos)