867
| Years: 863 864 865 866 - 867 - 868 869 870 871 | |
| Decades: 830s 840s 850s - 860s - 870s 880s 890s | |
| Centuries: 8th century - 9th century - 10th century | |
Events
- September: Basil I becomes sole ruler of the Byzantine Empire.
- September: Patriarch Photius I of Constantinople is removed from office and banished; Ignatius is patriarch of Constantinople once again.
- 14 December: Adrian II becomes pope.
- September: Michael III, emperor of Byzantium (assassinated)
- Pope Nicholas I
- Kassia, poet and composer