Plutarch (; Ancient Greek: Πλούταρχος, Ploútarchos, Koine Greek: [ˈplúːtarkʰos]; before AD 50 – after 120) was a Greek and later Roman Middle Platonist philosopher, historian, biographer, essayist, and priest at the Temple of Apollo in Delphi. He is known primarily for his Parallel Lives, a series of biographies of illustrious Greeks and Romans, and Moralia, a collection of essays and speeches. Upon becoming a Roman citizen, he was possibly named Lucius Mestrius Plutarchus (Λούκιος Μέστριος Πλούταρχος).
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