# 645 BC

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The year **645 BC** was a year of the [pre-Julian Roman calendar](/source/Roman_calendar). In the [Roman Empire](/source/Roman_Empire), it was known as **year 109 *[Ab urbe condita](/source/Ab_urbe_condita)***. The denomination 645 BC for this year has been used since the early medieval period, when the [Anno Domini](/source/Anno_Domini) [calendar era](/source/Calendar_era) became the prevalent method in Europe for naming years.

## Events

- The [Spring and Autumn Annals](/source/Spring_and_Autumn_Annals), a Chinese book of records, mentions that on December 24 of this year there were five meteors in the sky. It was the first Chinese observation of meteors.

## Deaths

- [Guan Zhong](/source/Guan_Zhong), prime minister of [Qi](/source/Qi_(state))
- [Archilochos](/source/Archilochos), Greek poet

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Adapted from the Wikipedia article [645 BC](https://en.wikipedia.org/wiki/645_BC) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/645_BC?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.