: 8th century
- 9th century
- 10th century
Decades: 750s 760s 770s 780s 790s - 800s - 810s 820s 830s 840s 850s
Years: 800 801 802 803 804 - 805 - 806 807 808 809 810
- Emperor Nicephorus I of Byzantium suffers a major defeat against the Saracens at Crasus.
- Tang Shun Zong succeeds Tang De Zong as emperor of China, but does not last till the end of the year.
- Oldest known mention of Magdeburg