The most common scholarly answer is that the Western Roman Empire lasted from about 27 BCE (establishment of the Empire under Augustus) to 476 CE (the deposition of Romulus Augustulus), roughly 500 years. If you include the Eastern Roman (Byzantine) Empire, some historians extend the timeline to 1453 CE with the fall of Constantinople, which would make the entire Roman imperial continuity about 1,480 years from 27 BCE to 1453 CE, though this longer span is debated depending on whether one counts the East as a continuation of the same empire.
Key nuances to note:
- Start date debates: some sources begin the imperial era at 27 BCE (Augustus) or even earlier with the Principate’s rise after the late Republic; others use 27 BCE as a conventional starting point for the Empire proper [Britannica, Britannica-based histories].
- Western fall: most agree the Western Empire ended in 476 CE when Odoacer deposed Romulus Augustulus [Britannica: height and decline of imperial Rome].
- Eastern continuity: the Byzantine Empire (Eastern Roman Empire) continued for nearly another thousand years after 476 CE, ending with the fall of Constantinople in 1453 CE [Britannica; Britannica history pages].
- Popular simplifications vary: some popular timelines cite about 500 years (27 BCE–476 CE) for the Western Empire, while others claim roughly 500–503 years depending on the exact endpoints used [various historical summaries].
Illustration (example timeline):
- 27 BCE: Augustus becomes first emperor; start of the Empire [navigational search query: "Augustus first emperor date"].
- c. 117 CE: Territorial peak under Trajan, illustrating the Empire’s height during the early to mid-2nd century [navigational search query: "Roman Empire height under Trajan"].
- 476 CE: Western Empire falls, traditionally marking the end of the Western Empire [navigational search query: "fall of Western Roman Empire 476"].
- 1453 CE: Fall of Constantinople, often cited as the end of the Eastern Roman Empire [navigational search query: "fall of Constantinople 1453"].
If you’d like, I can pull current scholarly sources to pin down a precise range and provide concise citations for the endpoints you prefer (Western only vs. entire imperial continuity).
Sources
Roman Empire - Expansion, Decline, Legacy: Who were the Five Good Emperors of the Roman Empire? The Five Good Emperors of Rome were Marcus Cocceius Nerva (reigned 96–98), Trajan (98–117), Hadrian (117–138), Antoninus Pius (138–161), and Marcus Aurelius (161–180). Their non-hereditary succession oversaw a golden age, which witnessed a considerable amount of expansion and consolidation. When did the Roman Empire fall? The fall of the Western Roman Empire began in 410, when Rome was sacked by the...
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centrodeservicios.konradlorenz.edu.coHow Long Did the Roman Empire Last?
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