| Years |
|---|
| Millennium |
| 1st millennium |
| Centuries |
| Decades |
| Years |
| 999 (year) by topic |
|---|
| Arts, history, and science |
| Countries |
|
|
| Lists of leaders |
| Birth and death categories |
| Establishments and disestablishments categories |
| Works category |
Wikimedia Commons has media related to 999 (year).
999 (CMXCIX) was a common year starting on Sunday in the Julian calendar.