The Roman Empire lasted for approximately 500 years, from its formal establishment in 27 BC until its collapse in AD 476. However, the Eastern Roman Empire, known as the Byzantine Empire, continued until 1453, extending the overall influence of Roman civilization for over a millennium https://nypost.com/2026/07/04/opinion/with-250-years-behind-it-america-now-needs-to-ensure-the-next-250-plus