History of the Roman Empire
The history of the Roman Empire covers the history of ancient Rome from the fall of the Roman Republic in 27 BC until the abdication of Romulus Augustulus in AD 476 in the West, and the Fall of Constantinople in the East in AD 1453. Ancient Rome became a territorial empire while still a republic, but was then ruled by Roman emperors beginning with Augustus, becoming the Roman Empire following the death of the last republican dictator, the first emperor's adoptive father Julius Caesar.
Roman aureus bearing the portraits of Mark Antony (left) and Octavian (right), issued in 41 BC to celebrate the establishment of the Second Triumvirate by Octavian, Antony and Marcus Lepidus in 43 BC. Both sides bear the inscription "III VIR R P C", meaning "One of Three Men for the regulation of the Republic".
The Augustus of Prima Porta
Portrait of Tiberius; Musée Saint-Raymond. Toulouse
The Great Cameo of France, a cameo five layers sardonyx, Rome, c. AD 23, depicting the emperor Tiberius seated with his mother Livia and in front of his designated heir Germanicus, with the latter's wife Agrippina the Elder; above them float the deceased members of their house: Augustus, Drusus Julius Caesar, and Nero Claudius Drusus
The Roman Empire was the post-Republican state of ancient Rome. It is generally understood to mean the period and territory ruled by the Romans following Octavian's assumption of sole rule under the Principate in 27 BC. It included territories in Europe, North Africa, and Western Asia and was ruled by emperors. The fall of the Western Roman Empire in 476 AD conventionally marks the end of classical antiquity and the beginning of the Middle Ages.
Augustus of Prima Porta
Nerva (r. 96–98)
Trajan (r. 98–117)
Hadrian (r. 117–138)