225 BC

Centuries: 4th century BC - 3rd century BC - 2nd century BC

Decades: 270s BC 260s BC 250s BC 240s BC 230s BC - 220s BC - 210s BC 200s BC 190s BC 180s BC 170s BC

Years: 230 BC 229 BC 228 BC 227 BC 226 BC - 225 BC - 224 BC 223 BC 222 BC 221 BC 220 BC

Events
* Seleucus III Ceraunus succeeds his father Seleucus II Callinicus as king of the Seleucid dynasty.
* Battle of Faesulae, Romans are defeated by the Gauls of Northern Italy.
* Eratosthenes of Cyrene calculates the circumference of the Earth and invents armillary sphere
* Apollonius of Perga writes On Conic Sections and names the ellipse, parabola, and hyperbola.
* State of Qin conquered the state of Wei in China.

Births

Deaths
* Fan Ju
* Seleucus II Callinicus, king of the Seleucid dynasty. (riding accident)