Introduction and Sources The Vita of the emperor in the collection known as the Historia Augusta identifies him in its heading as Marcus Antoninus Philosophus, “Marcus Antoninus the Philosopher.” Toward the end of the work, the following is reported about him, sententia Platonis semper in ore illius fuit, florere civitates si aut philosophi imperarent aut imperantes philosopharentur (27.7), “Plato’s judgment was always … Continue reading Marcus Aurelius (A.D. 161-180)