Decades: 290s BC 280s BC 270s BC 260s BC 250s BC - **240s BC** - 230s BC 220s BC 210s BC 200s BC 190s BC

246 BC 245 BC 244 BC 243 BC 242 BC - **241 BC** - 240 BC 239 BC 238 BC 237 BC 236 BC

- Carthage and Rome sign a peace treaty, ending the First Punic War.
- The number of Roman tribes is set at 35.
- Cleomenes III becomes king of Sparta.
- Attalus I becomes king of Pergamon.