The Julio-Claudian dynasty comprised the first five Roman emperors: Augustus, Tiberius, Caligula, Claudius, and Nero.
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
Coin of Kushan ruler Kujula Kadphises (circa AD 30/50–80). Obv Laureate "Julio-Claudian" style head right. Rev Kujula Kadphises seated right, raising hand; tripartite symbol to left.[clarification needed]
The Roman emperor was the ruler and monarchical head of state of the Roman Empire, starting with the granting of the title augustus to Octavian in 27 BC. The term "emperor" is a modern convention, and did not exist as such during the Empire. Often when a given Roman is described as becoming emperor in English, it reflects his taking of the title augustus and later basileus. Another title used was imperator, originally a military honorific, and caesar, originally a surname. Early emperors also used the title princeps alongside other Republican titles, notably consul and pontifex maximus.
Bust of Augustus wearing the corona civica
Augustus depicted as a magistrate at the Ny Carlsberg Glyptotek
Cameo of Augustus in a quadriga drawn by tritons at the Kunsthistorisches Museum, Vienna
Denarius of Augustus (18 BC).