Year by year · 5th century BCE

403 BCE

403 BCE in world history: 2 events and 3 states founded. 336 recorded states existed that year.

ProfileState269 states with a known seat in 403 BCEOpen the atlas at 403 BCE →

In the profiles

  • Ancient GreekAthens officially adopts the Ionic alphabet of twenty-four letters
  • Direct democracyThe Athenians restore their democracy after the rule of the Thirty Tyrants

States founded 3

All years → The 5th century BCE →

Cite this page
APA
The Epoch Institute. (2026). 403 BCE. In The Epoch Institute, Year by Year. https://the-epoch-institute.org/years/403-bce
MLA
“403 BCE.” The Epoch Institute, Year by Year, The Epoch Institute, 2026, https://the-epoch-institute.org/years/403-bce. Accessed .
Chicago
The Epoch Institute. “403 BCE.” The Epoch Institute, Year by Year. 2026. https://the-epoch-institute.org/years/403-bce.
Harvard
The Epoch Institute (2026) ‘403 BCE’, The Epoch Institute, Year by Year. Available at: https://the-epoch-institute.org/years/403-bce (Accessed: ).