This category has the following 18 subcategories, out of 18 total.
- 800s in the Byzantine Empire (7 P)
- 800s conflicts (9 P)
- 800s disestablishments (3 C, 2 P)
- 800s establishments (11 C, 1 P)
- 800s in religion (2 C)
- 800s works (9 C)