Centuries: 4th century BC - 3rd century BC - 2nd century BC
- August 18 - Oldest known Roman temple to Venus founded, institution of Vinalia Rustica begins.
- Oldest known temple to Venus built
- Seleucus I Nicator installs his son Antiochus as viceroy at Baghdad.
- Battle of Aquilonia: The Samnites are decisvely defeated by the Romans.