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The Julio-Claudian dynasty, also known as the Julian-Claudian dynasty, was a prominent Roman dynasty that ruled the Roman Empire from 27 BC to 68 AD. The dynasty was founded by Augustus, the adopted son of Julius Caesar, and included Tiberius, Caligula, Claudius, and Nero. The Julio-Claudian dynasty is known for its contributions to the expansion of the Roman Empire and its impact on Roman culture and politics.