780
| Years: 776 777 778 779 – 780 – 781 782 783 784 | |
| Decades: 750s 760s 770s – 780s – 790s 800s 810s | |
| Centuries: 7th century – 8th century – 9th century | |
Events
- Constantine VI becomes Byzantine Emperor with Irene as guardian.
- Tang De Zong becomes emperor of China.
- Drest III succeeds Alpin II as king of the Picts.
- The city of Osnabrück is founded by Charlemagne (approximate date)
Births
- al-Khwarizmi, Muslim mathematician (approximate date)
Deaths
- September 8 – Leo IV, Byzantine Emperor
Categories: 780