Roman Empire

Roman Empire

27 BC – AD 476 (traditional dates)[1][2]
AD 395 – 476/480 (Western)
AD 395–1453 (Eastern)
Flag of Roman Empire
Vexillum
with the imperial aquila
Imperial aquila of Roman Empire
Imperial aquila
The Roman Empire in AD 117 at its greatest extent, at the time of Trajan's death
The Roman Empire in AD 117 at its greatest extent, at the time of Trajan's death
Capital
Common languages
Religion
GovernmentSemi-elective, functionally absolute monarchy
Emperor 
• 27 BC – AD 14
Augustus (first)
• 98–117
Trajan
• 270–275
Aurelian
• 284–305
Diocletian
• 306–337
Constantine I
• 379–395
Theodosius I[n 3]
• 474–480
Julius Nepos[n 4]
• 475–476
Romulus Augustus
• 527–565
Justinian I
• 610–641
Heraclius
• 780–797
Constantine VI[n 5]
• 976–1025
Basil II
• 1449–1453
Constantine XI[n 6]
LegislatureSenate
Historical eraClassical era to Late Middle Ages
32–30 BC
30–2 BC
• Constantinople
becomes capital
11 May 330
• Final East-West divide
17 Jan 395
4 Sep 476
• Murder of Julius Nepos
25 Apr 480
12 Apr 1204
• Reconquest of Constantinople
25 Jul 1261
29 May 1453
• Fall of Trebizond
15 August 1461
Area
25 BC[3]2,750,000 km2 (1,060,000 sq mi)
117 AD[3][4]5,000,000 km2 (1,900,000 sq mi)
AD 390[3]4,400,000 km2 (1,700,000 sq mi)
Population
• 25 BC[5]
56,800,000
Currencysestertius,[n 7] aureus, solidus, nomisma
Preceded by
Succeeded by
Roman Republic
Western Roman Empire
Eastern Roman Empire

The Roman Empire (Latin: Imperium Romanum [ɪmˈpɛri.ũː roːˈmaːnũː]; Koinē Greek: Βασιλεία τῶν Ῥωμαίων, romanized: Basileía tōn Rhōmaíōn) was the post-Republican period of ancient Rome. As a polity it included large territorial holdings around the Mediterranean Sea in Europe, Northern Africa, and Western Asia ruled by emperors. From the accession of Caesar Augustus to the military anarchy of the 3rd century, it was a principate with Italy as metropole of the provinces and the city of Rome as sole capital (27 BC – AD 286). After the military crisis, the empire was ruled by multiple emperors who shared rule over the Western Roman Empire and over the Eastern Roman Empire (also known as the Byzantine Empire). Rome remained the nominal capital of both parts until AD 476, when the imperial insignia were sent to Constantinople, following the capture of Ravenna by the barbarians of Odoacer and the subsequent deposition of Romulus Augustulus. The adoption of Christianity as the state church of the Roman Empire in AD 380 and the fall of the Western Roman Empire to Germanic kings conventionally marks the end of Classical antiquity and the beginning of the Middle Ages. Those events, along with the gradual hellenization of the Eastern Roman Empire is why historians distinguish the medieval Roman Empire that remained in the Eastern provinces as the Byzantine Empire.

The predecessor state of the Roman Empire, the Roman Republic (which had replaced Rome's monarchy in the 6th century BC) became severely destabilized in a series of civil wars and political conflicts. In the mid-1st century BC, Julius Caesar was appointed as perpetual dictator and then assassinated in 44 BC. Civil wars and proscriptions continued, culminating in the victory of Octavian, Caesar's adopted son, over Mark Antony and Cleopatra at the Battle of Actium in 31 BC. The following year Octavian conquered Ptolemaic Egypt, ending the Hellenistic period that had begun with the conquests of Alexander the Great of Macedon in the 4th century BC. Octavian's power then became unassailable, and in 27 BC the Roman Senate formally granted him overarching power and the new title Augustus, effectively making him the first Roman emperor.

The first two centuries of the Empire saw a period of unprecedented stability and prosperity known as the Pax Romana ("Roman Peace"). Rome reached its greatest territorial expanse during the reign of Trajan (AD 98–117). A period of increasing trouble and decline began with the reign of Commodus (177–192). In the 3rd century the Empire underwent a crisis that threatened its existence, as the Gallic Empire and Palmyrene Empire broke away from the Roman state, and a series of short-lived emperors, often from the legions, led the empire. The empire was reunified under Aurelian (r. 270–275). In an effort to stabilize it, Diocletian set up two different imperial courts in the Greek East and Latin West in 286. Christians rose to positions of power in the 4th century following the Edict of Milan of 313. Shortly after, the Migration Period, involving large invasions by Germanic peoples and by the Huns of Attila, led to the decline of the Western Roman Empire. With the fall of Ravenna to the Germanic Herulians and the deposition of Romulus Augustus in AD 476 by Odoacer, the Western Roman Empire finally collapsed; the Eastern Roman Emperor Zeno formally abolished it in AD 480. Nonetheless, some states in the territories of the former Western Roman Empire would later claim to have inherited the supreme power of the emperors of Rome, most notably the Holy Roman Empire. The Eastern Roman Empire survived for another millennium, until Constantinople fell to the Ottoman Turks of Sultan Mehmed II in 1453.[n 8]

Due to the Roman Empire's vast extent and long endurance, the institutions and culture of Rome had a profound and lasting influence on the development of language, religion, art, architecture, philosophy, law, and forms of government in the territory it governed, and far beyond. The Latin language of the Romans evolved into the Romance languages of the medieval and modern world, while Medieval Greek became the language of the Eastern Roman Empire. The Empire's adoption of Christianity led to the formation of medieval Christendom. Greek and Roman art had a profound impact on the Italian Renaissance. Rome's architectural tradition served as the basis for Romanesque, Renaissance and Neoclassical architecture, and also had a strong influence on Islamic architecture. The corpus of Roman law has its descendants in many legal systems of the world today, such as the Napoleonic Code, while Rome's republican institutions have left an enduring legacy, influencing the Italian city-state republics of the medieval period, as well as the early United States and other modern democratic republics.
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  1. ^ Morley, Neville (17 August 2010). The Roman Empire: Roots of Imperialism. ISBN 978-0-7453-2870-6.
  2. ^ Diamond, Jared (4 January 2011). Collapse: How Societies Choose to Fail or Succeed: Revised Edition. ISBN 978-1-101-50200-6.
  3. ^ a b c Taagepera, Rein (1979). "Size and Duration of Empires: Growth-Decline Curves, 600 B.C. to 600 A.D". Social Science History. Duke University Press. 3 (3/4): 125. doi:10.2307/1170959. JSTOR 1170959.
  4. ^ Turchin, Peter; Adams, Jonathan M.; Hall, Thomas D (2006). "East-West Orientation of Historical Empires" (PDF). Journal of World-Systems Research. 12 (2): 222. ISSN 1076-156X. Retrieved 6 February 2016.
  5. ^ Durand, John D. (1977). "Historical Estimates of World Population: An Evaluation". Population and Development Review. 3 (3): 253–296. doi:10.2307/1971891. JSTOR 1971891.