- Legendary event disputed by scholars
- Traditionally dated as 509 BC
- King Lucius Tarquinius Superbus (Tarquin) overthrown
- Sextus Tarquinius (son of Tarquin) raped Lucretia
- Lucretia commits suicide
- Lucius Junis Brutus gained support of the Roman elite to overthrow Tarquin
- Roman Republic established with two elected consuls
- Tarquin exiled to Cumae and died in 495 BC