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Millennium:	1st millennium BC
Centuries:	4th century BC – 3rd century BC – 2nd century BC
Decades:	280s BC 270s BC 260s BC – 250s BC – 240s BC 230s BC 220s BC
Years:	259 BC 258 BC 257 BC 256 BC 255 BC 254 BC 253 BC 252 BC 251 BC 250 BC
Categories:	Births – Deaths – Architecture Establishments – Disestablishments

Events and trends

Births

Deaths