This post is a list of Roman civilization historical periods. There are 3 periods listed below chronologically.
Roman Kingdom (c. 753 - 509 BC)
"...settlements around the Palatine Hill along the river Tiber in central Italy, and ended with the overthrow of the kings and the establishment of the Republic..." (Wikipedia: Roman Kingdom, 6.1.25 UTC 05:01 UTC)
Roman Republic (c. 509 - 27 BC)
"During this period, Rome's control expanded form the city's immediate surroundings to hegemony over the entire Mediterranean world... There were annual elections, but the republican system was an elective oligarchy, not a democracy... Throughout the republican era Rome was in a state of near-perpetual war." (Wikipedia: Roman Republic, 5.30.25 UTC 19:28)
Roman Empire (27 BC - 476 AD / 1453 AD)
"The first two centuries of the Empire saw a period of unprecedented stability and prosperity known as the Pax Romana... In the 3rd century, the Empire underwent a 49-year crisis that threatened its existence due to civil war, plagues and barbarian invasions... Theodosius I, the last emperor to rule over both East and West, died in 395... In 476 by Odoacer, the Western Empire finally collapsed. The Byzantine (Eastern Roman) Empire survived for another millennium with Constantinople as its sole capital, until the city's fall in 1453." (Wikipedia: Roman Empire, 5.26.25 UTC 22:37)