What happened in 500 BCE?

Answer 1

The year 500 BC was a year of the pre-Julian Roman calendar. In the Roman Empire it was known as the Year of the Consulship of Camerinus and Longus (or, less frequently, year 254 Ab urbe condita). The denomination 500 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.