Year 300 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Corvus and Pansa (or, less frequently, year 454 Ab urbe condita).

The 3rd century BC started the first day of 300 BC and ended the last day of 201 BC. It is considered part of the Classical Era, epoch, or historical period.

301 BC Antigonus I Monophthalmus, Macedonian general under Alexander the Great who founded and became the first king of the Macedonian dynasty of the Antigonids (b. 382 BC)

The DK Atlas of World History, 2000 edition. (See specific references below) John Nelson. Interactive Historical Atlas of the World since 500BCE. Map of the “Countries of the World 1/1/300 BCE.”

Ptolemy responded by invading the Seleucid Empire, advancing all the way to Bactria. He captured Babylon and Susa along the way, amassing much spoils. A revolt at home forced Ptolemy to return to Egypt. 240 BC Archemides Shows Value Of Pi - Archemides the Greek mathmatician was the first to determine the value of pi.

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Year 300 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Corvus and Pansa (or, less frequently, year 454 Ab urbe condita).

B.C. 300 Rice farming begins in Japan 300 Latin gradually wins over other Italic languages 298 Gauls join Samnites and Latins against Rome in the Third Samnite War 297 Lighthouse at Alexandria built 290 Third Samnite War ends with Roman victory in central Italy 287 Full equality between patricians and plebeians is agreed 287 The plebeians pass a new law: the decisions of the assembly can ...

Discover how long ago 300 BC was. It's been 2324 years! Explore time calculations, historical context, and interesting comparisons.

301 BC Battle Of Ipsus - Antigonus attempted to reunite Alexander's empire under his control. He invaded Egypt, but his forces and those of his son Demetrius were defeated. 300 BC Euclid Publishes Elements -The Greek mathmatician Euclid living in Alexandria, published a 13 volume work called Elements.