Eunapius (Greek: Εὐνάπιος; c. 347 - c. 420) was a Greek sophist, rhetorician, and historian from Sardis in the region of Lydia in Asia Minor. His principal surviving work is the Lives of Philosophers and Sophists (Greek: Βίοι Φιλοσόφων καὶ Σοφιστῶν; Latin: Vitae sophistarum), a collection of the biographies of 24 philosophers and sophists.