|Millennium:||1st millennium BC|
|510 BC by topic|
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The year 510 BC was a year of the pre-Julian Roman calendar. In the Roman Empire, it was known as year 244 Ab urbe condita. The denomination 510 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
- Hippias, tyrant of Athens, is expelled by his people with the assistance of Cleomenes, King of Sparta.
- The reign of Lucius Tarquinius Superbus, last king of the traditional seven Kings of Rome, concludes. The Kingdom of Rome falls and is replaced by the Roman Republic. (or 509 BC)
- Ariston is succeeded as King of Sparta by Demaratus.
- Stelae begin to be banned in Athenian cemeteries (approximate date; ends c. 430 BC).