Roman Empire, political system established by Rome that lasted for nearly five centuries. Historians usually date the beginning of the Roman Empire from 27 bc when the Roman Senate gave Gaius Octavius the name Augustus and he became the undisputed emperor after years of bitter civil war. At its peak the empire included lands throughout the Mediterranean world. Rome had first expanded into other parts of Italy and neighboring territories during the Roman Republic (509-27 bc), but made wider conquests and solidified political control of these lands during the empire. The empire lasted until…
