Ptolemy I proclaims himself king
Alexander's general founds the last dynasty of pharaohs

The Macedonian general Ptolemy governed Egypt as satrap from 323 BC and in 305/304 BC took the title of king and pharaoh. His descendants ruled until Cleopatra's death in 30 BC; under him work began on the Library and the Lighthouse of Alexandria.
Wikipedia (Russian) · Wikipedia (English) · 4th century BC
Meanwhile around the world (±25 years)
Middle East
- 323 BC Death of Alexander the Great — 18 years earlier
- 312 BC Seleucus retakes Babylon: the Seleucid era — 7 years earlier
- 301 BC The Battle of Ipsus — 4 years later
Asia
- c. 322 BC Founding of the Maurya Empire — 17 years earlier
Americas
- c. 300 BC Maya script — 5 years later
- c. 300 BC–150 El Mirador, capital of the Preclassic Maya — 5 years later
Alive at the time
- Mencius (aged 67)
- Epicurus (aged 36)
- Chandragupta Maurya (aged 35)
- Euclid (aged 20)
- Zhuangzi (aged 64)
- Ptolemy I Soter (aged 62)
- Pyrrho (aged 55)
- Pytheas (aged 45)
- Qu Yuan (aged 35)
- Zeno of Citium (aged 29)