title: 621 BC
text: # 621 BC
  
  The year 621 BC was a year of the pre-Julian Roman calendar. In the Roman Empire, it was known as year 133 Ab urbe condita . The denomination 621 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.
  
  ## Deaths
  
  * Duke Mu of Qin, ruler of Qin (state)
  * Duke Xiang of Jin, ruler of Jin (state)
  * Zhan Huo, Chinese governor
  