Ancient Rome By pibel25 753 BCE Rome is founded Period: 753 BCE to 476 Ancient Rome Period: 753 BCE to 509 BCE Monarchy 509 BCE Becomes a republic run by senators Period: 509 BCE to 27 BCE Republic 45 BCE Julius Caeser becomes first dictator 44 BCE Julius Caesar asesinated 27 BCE Roman empire begins Period: 27 BCE to 476 Roman empire 117 Roman empire is at is peak 306 Constantine becomes emperor. Rome becomes a christian empire 395 Rome splits in 2 476 Fall of ancient Rome and Roman empire