Major Periods of Roman History By Ellioot Period: 700 BCE to 509 Regal Period Period: 510 BCE to 1 CE Republic Times Nobles were representatives Period: 510 BCE to 1 CE Expansion 509 BCE The Last King was Removed Period: 2 to 409 Empire Times 285 Empire Division 306 Christianity Emperor Constantine became a Christian 410 VIsigoths War The Empire never recovered