Ancient Rome By alex_george04 Period: 306 BCE to 37 BCE Emporer Constantine rules Period: 305 BCE to 284 BCE Emporer Diocletian Rules 200 BCE Decline of Rome begins Period: 180 BCE to 92 BCE Emperor Commodus Period: 180 BCE to 96 BCE The five good Emporers rule Period: 68 BCE to 54 BCE Nero rules Rome Period: 68 BCE to 27 BCE The Julio-Claudian dynasty rules Period: 54 BCE to 41 BCE Claudius rules Rome Period: 41 BCE to 37 BCE Caligula rules Rome Period: 37 BCE to 14 BCE Tiberius rules Rome 27 BCE Augustus reforms Rome Period: 27 BCE to 14 BCE Augustus rules Rome