From Wikipedia, the free encyclopedia.
Centuries: 4th century BC - 3rd century BC - 2nd century BC
Decades: 300s BC 290s BC 280s BC 270s BC 260s BC - 250s BC - 240s BC 230s BC 220s BC 210s BC 200s BC
Years: 259 BC 258 BC 257 BC 256 BC 255 BC 254 BC 253 BC 252 BC 251 BC 250 BC
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