1st century BC
Also known as 1st century BCE, First century BC, First century B.C., First century BCE, 1st BCE, 1st-century BC
century
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The 1st century BC refers to the 100 years from 100 BC to 1 BC, marking a crucial period in world history when major civilizations like Rome, China, and Egypt were undergoing significant transformation and expansion. This era matters because many of the political, cultural, and social foundations that would shape the following centuries—including the rise of the Roman Empire and the spread of key religions and philosophies—were established during this time.
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Map of the world in 100 BC, the beginning of the first century BC Map of the world in 50 BC Map of the world in 1 AD, shortly after the end of the first century BC
The 1st century BC, also known as the last century BC and the last century BCE, started on the first day of 100 BC and ended on the last day of 1 BC. The AD/BC notation does not use a year zero; however, astronomical year numbering does use a zero, as well as a minus sign, so "2 BC" is equal to "year –1". 1st century AD (Anno Domini) follows.