The Roman Empire (
Latin:
Imperium Rōmānum;
Classical Latin: [ɪmˈpɛ.ri.ũː roːˈmaː.nũː]) was the post-Republican period of the ancient
Roman civilization, characterized by government headed by emperors and large territorial holdings around the
Mediterranean Sea in
Europe,
Africa and
Asia. The 500-year-old republic which preceded it was severely destabilized in a series of civil wars and political conflict, during which
Julius Caesar was appointed as perpetual dictator and then assassinated in 44 BC.
Civil wars and executions continued, culminating in the victory of
Octavian, Caesar's adopted son, over
Mark Antony and
Cleopatra at the
Battle of Actium in 31 BC and the annexation of
Egypt.
Octavian's power was now unassailable and in 27 BC the
Roman Senate formally granted him overarching power and the new title
Augustus, effectively marking the end of the
Roman Republic.
The imperial successor to the
Republic endured for some
500 years. The first two centuries of the
Empire's existence were a period of unprecedented political stability and prosperity known as the
Pax Romana, or "
Roman Peace".
Following Octavian's victory, the size of the Empire was dramatically increased. After the assassination of
Caligula in 41, the
Senate briefly considered restoring the republic, but the
Praetorian Guard proclaimed
Claudius Emperor instead. Under Claudius, the Empire underwent its first major expansion since Augustus. After Claudius' successor,
Nero, committed suicide in 68, the Empire suffered a period of brief civil wars, as well as a concurrent major rebellion in
Judea, during which four different legionary generals were proclaimed Emperor.
Vespasian emerged triumphant in 69, establishing the
Flavian dynasty, before being succeeded by his son
Titus, who opened the
Colosseum shortly after the eruption of
Mt. Vesuvius. His short reign was followed by the long reign of his brother
Domitian, who was eventually assassinated.
The Senate then appointed the first of the
Five Good Emperors.
The Empire reached its greatest extent under
Trajan, the second in this line.
A period of increasing trouble and decline began with the reign of
Commodus. Commodus' assassination in
192 triggered the
Year of the Five Emperors, of which
Septimius Severus emerged victorious. The assassination of
Alexander Severus in 235 led to the
Crisis of the Third Century in which 26 men were declared Emperor by the Roman Senate over a fifty-year period. It was not until the reign of
Diocletian that the Empire was fully stabilized with the introduction of the
Tetrarchy, which saw four Emperors rule the Empire at once. This arrangement was ultimately unsuccessful, leading to a civil war that was finally ended by
Constantine I, who defeated his rivals and became the sole ruler of the Empire.
Constantine subsequently shifted the capital of the east to
Byzantium, which was renamed
Constantinople in his honor. It remained the capital of the east until its demise in 1453. Constantine also adopted
Christianity which later became the official state religion of the Empire. This eastern part of the empire (known later as the
Byzantine Empire) remained one of the leading powers in the world alongside its arch-rival the
Sassanid Persian Empire, which had inherited a centuries-old Roman-Persian conflict from its predecessor the
Parthians. Following the death of
Theodosius I, the last Emperor to rule a united Empire, the dominion of the Empire was gradually eroded by abuses of power, civil wars, barbarian migrations and invasions, military reforms and economic depression.
The Sack of Rome in 410 by the
Visigoths and again in 455 by the
Vandals accelerated the
Western Empire's decay, while the deposition of the Emperor
Romulus Augustulus in 476 by
Odoacer is generally accepted to mark the end of the Empire in the west. However, with Romulus Augustulus technically being a usurper, the
Western part of the empire only truly legally ceased to exist upon the death of the true Emperor
Julius Nepos in 480. The
Eastern Roman Empire endured for another thousand years, eventually falling to the
Ottoman Turks in 1453.
The Roman Empire was among the most powerful economic, cultural, political and military forces in the world of its time. It was the largest empire of the classical antiquity period, and one of the largest empires in world history.
- published: 28 Apr 2015
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