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

Decades: 200s - 210s - 220s - 230s - 240s - 250s - 260s - 270s - 280s - 290s - 300s

Years: 250 251 252 253 254 255 256 257 258 259

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Events

• Crisis of the Third Century
• End of Yayoi era and beginning of Kofun period, the first part of the Yamato period in Japan.
• Martyrdom of St. Denis.

Significant people

• Cniva, King of the Goths
• Decius, Roman Emperor
• Trebonianus Gallus, Roman Emperor
• Valerian, Roman Emperor