es:320 adClb:-320 Centuries: 5th century BC - 4th century BC - 3rd century BC

Decades: 370s BC 360s BC 350s BC 340s BC 330s BC - 320s BC - 310s BC 300s BC 290s BC 280s BC 270s BC

325 BC 324 BC 323 BC 322 BC 321 BC - 320 BC - 319 BC 318 BC 317 BC 316 BC 315 BC

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Births

• Timocharis of Alexandria, Greek astronomer responsible for the first recorded observation of Mercury and the first star catalogue.

Deaths

• Anaximenes of Lampsacus, Greek rhetorician and historian.
• Zoilus, Greek grammarian and critic.

Events

• Aristophanes defines rhythm as tripartite (consisting of three parts).
• End of the First War of the Diadochi (322-320 BC), one of many fought between the successors to Alexander the Great after his death in 323 BC.
• Theophrastus begins the systematic study of botany.
• Zhou Shen Jing Wang becomes King of the Zhou Dynasty of China.