| content |
| Millennia: | 1st millennium |
| Centuries: | 2nd century - 3rd century - 4th century |
| Decades: | 220s 230s 240s - 250s - 260s 270s 280s |
| Years: | 250 251 252 253 254 255 256 257 258 259 |
| Categories: | Births - Deaths - Architecture Establishments - Disestablishments |
Events and Trends
- Crisis of the Third Century
- End of Yayoi era and beginning of Kofun era, the first part of the Yamato period in Japan.
- Martyrdom of St. Denis.
Significant people
- Cniva, King of the Goths
- Decius, Roman Emperor
- Trebonianus Gallus, Roman Emperor
- Valerian, Roman Emperor
