Plato founds the Academy
A school in the grove of Akademos names every academy to come

Around 387 BC Plato began teaching philosophy in the grove of the hero Akademos outside the walls of Athens; Aristotle studied there for twenty years. The Platonist school lasted into Roman times, and the revived Academy was closed by Emperor Justinian in AD 529.
Wikipedia (Russian) · Wikipedia (English) · 4th century BC
Meanwhile around the world (±25 years)
Asia
- 403 BC The Partition of Jin opens the Warring States — 16 years earlier
Alive at the time
- Plato (aged 41)
- Hippocrates (aged 73)
- Democritus (aged 73)
- Antisthenes (aged 58)
- Diogenes of Sinope (aged 25)
- Shang Yang (aged 3)