Decades: 310s BC 300s BC 290s BC 280s BC 270s BC - **260s BC** - 250s BC 240s BC 230s BC 220s BC 210s BC

273 BC 272 BC 271 BC 270 BC 269 BC **268 BC** - 267 BC 266 BC 265 BC 264 BC 263 BC

- The Chremonidean War begins.
- Antigonus II Gonatas conquers Athens.