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

Years: 267 BC 266 BC 265 BC 264 BC 263 BC - **262 BC** - 261 BC 260 BC 259 BC 258 BC 257 BC

- The Siege of Agrigentum begins: Roman Republic blocks the city
- Original Temple of Artemis burns down

- Apollonius of Perga, Greek geometer