Decades: 330s BC 320s BC 310s BC 300s BC 290s BC - **280s BC** - 270s BC 260s BC 250s BC 240s BC 230s BC

293 BC 292 BC 291 BC 290 BC 289 BC **288 BC** 287 BC 286 BC 285 BC 284 BC 283 BC

- King Demetrius I of Macedon flees Macedonia after an attack by Pyrrhus of Epirus.
- Lysimachus and Pyrrhus partition Macedonia.
- Aristarchus is the first to say that the sun is the center of universe (see heliocentric theory)

- Agathocles, tyrant of Syracuse