Sextus of Chaeronea (Ancient Greek: Σέξτος ὁ Χαιρωνεύς Sextos ho Chaironeus; c. 95 – c. 185) was a philosopher, a nephew or grandson[1] of Plutarch,[2] and one of the teachers of the emperor Marcus Aurelius.

And Lucius, raising his hand to heaven, said, "O Zeus, the king of the Romans in his old age takes up his tablets and goes to school!

The aptness of his courtesy to each individual lent a charm to his society more potent than any flattery, yet at the same time it exacted the complete respect of all present.

I now lament the person who I hoped would speak more forcefully than Minucianus, more solemnly than Nicagoras, more eloquently than Plutarch, more philosophically than Musonius, more intrepidly than Sextus—in a word, more brilliantly and better than all of his ancestors.

"[19] The Chronography of George Synkellos has a similar mention of Sextus associated with events from 109 to 120 "In old age the philosopher Plutarch of Chaeronea was appointed by the Emperor as procurator of Greece.