999
- This article is about the year 999. For other uses of 999, see 999 (number).
| Years: 996 997 998 – 999 – 1000 1001 1002 | |
| Decades: 960s 970s 980s – 990s – 1000s 1010s 1020s | |
| Centuries: 9th century – 10th century – 11th century 999 (number) | |
Events
- Silesia is incorporated into territory ruled by Boleslaus I of Poland
- Pope Silvester II succeeds Pope Gregory V
Deaths
- December 16 – Saint Adelaide of Italy (b. 931)
Categories: 999