Decades: 500s BC 490s BC 480s BC 470s BC 460s BC - **450s BC** - 440s BC 430s BC 420s BC 410s BC 400s BC

Years: 456 BC 455 BC 454 BC 453 BC 452 BC - **451 BC** - 450 BC 449 BC 448 BC 447 BC 446 BC

- Athens wages a war against Persia
- The Laws of the twelve tables form the beginning of Roman Law
- Tomb of Mausolus is completed (this is the first mausoleum)

**Deaths**

- Cimon, Athenian politician (approximate year)