815
| Years: 811 812 813 814 - 815 - 816 817 818 819 | |
| Decades: 780s 790s 800s - 810s - 820s 830s 840s | |
| Centuries: 8th century - 9th century - 10th century | |
Events
- An iconoclastic synod is held.
- Ecgbert ravages the territories of the west Welsh (Cornwall).
Deaths
- June 2: Saint Nicephorus, patriarch of Constantinople
- Abu Musa Jabir Ibn Hayyan (Geber), Arab alchemist (approximate date)