240
- For alternate uses, see Number 240.
| Years: 236 237 238 239 - 240 - 241 242 243 244 | |
| Decades: 210s 220s 230s - 240s - 250s 260s 270s | |
| Centuries: 2nd century - 3rd century - 4th century | |
Events
- Maharaja Sri-Gupta, becomes Emperor of Gupta
Births
- Sporus of Nicaea, Greek mathematician and astronomer (approximate date)
- Cao Mao, emperor of the Kingdom of Wei (approximate date)
Deaths
- Ammonius Saccas, Neoplatonic philosopher (approximate date)
- Tertullian, Christian writer (approximate date)