List of Roman Emperors
This is a list of Roman Emperors. Shown are the dates of their reign.
(Note that, contrary to popular belief, Julius Caesar was never Emperor (princeps), although he was named dictator for life in 45 BC (but was not the first Roman to hold that title) and was regarded as such by Roman historians.)
Rulers during the Crisis of the Third Century
House of Constantine
House of Theodosius
continuation: see list of Barbarian kings of Rome