This is a timeline of Roman history, comprising important legal and territorial changes and political events in the Roman Kingdom and Republic and the Roman and Byzantine Empires. To read about the background of these events, see Ancient Rome and History of the Byzantine Empire.

Events and persons of the Kingdom of Rome (and to some degree of the early Republic) are legendary, and their accounts are considered to have varying degrees of veracity.

Following tradition, this timeline marks the deposition of Romulus Augustulus and the Fall of Constantinople as the end of Rome in the west and east, respectively. See Third Rome for a discussion of claimants to the succession of Rome.