509 BC (Five Hundred Nine Before Christ) was a year of the pre-Julian Roman calendar. In the Roman system, it was known as the Year of the Consulship of Brutus and Collatinus.
Events
- Foundation of the Roman Republic: According to traditional Roman chronology and legend, 509 BC marks the year of the overthrow of the Roman Kingdom and the establishment of the Roman Republic. The last king of Rome, Lucius Tarquinius Superbus, was expelled from the city following the outrage over the rape of Lucretia by his son, Sextus Tarquinius.
- Establishment of the Consulship: Following the expulsion of the king, the monarchy was replaced by a republican form of government headed by two annually elected magistrates called consuls. The first two consuls are traditionally identified as Lucius Junius Brutus and Lucius Tarquinius Collatinus (the husband of Lucretia), though Collatinus was soon forced to resign due to his connection to the Tarquins and was replaced by Publius Valerius Publicola.
- Temple of Jupiter Optimus Maximus: The Temple of Jupiter Optimus Maximus on the Capitoline Hill, initiated by Tarquinius Priscus and continued by Tarquinius Superbus, is traditionally dedicated in this year upon the establishment of the Republic. This temple became a central religious and political symbol of Rome.
Significance
The events of 509 BC are foundational to the traditional narrative of Roman history. While many of the specific details are considered legendary by modern historians, the date marks a pivotal transition from monarchical rule to a republican system that would govern Rome for nearly 500 years, laying the groundwork for its eventual rise as a dominant power in the Mediterranean world.