Historians believe that the city of Rome was founded in 625 BC, which means that the Romans lived more than two and a half thousand years ago. The final fall of Rome occurred in the year 1453 AD, which means that some Romans lived less than six hundred years ago.
There is some debate concerning the founding date of Rome and the fall of Rome, but the Roman Republic, the main successful form of government in Rome, lasted from 510 BC until 23 BC. The majority of the Roman empire ended in AD 476, but a Roman enclave of sorts survived in the east for another thousand years. In general, Romans lived between one and two and a half thousand years ago.