Gaius the Platonist was aMiddle Platonist philosopher who was active in the early to middle 2nd century AD.^[1][2] Very little is known about him or his philosophical opinions,^[3] None of Gaius's work survives, and we have no direct evidence that he ever wrote anything, however, the summaries of his teachings by his students influenced later developments ofNeoplatonism.^[1] He was the teacher ofAlbinus, who was the teacher ofGalen, and is known to have published a lost nine-volume summary of Gaius' lectures onPlato,^[4] which were used by theNeoplatonist philosopherPriscian of Lydia.^[5]Porphyry also mentions the works of Gaius were read in the school ofPlotinus.^[6][1] It has also been speculated that theOn Plato and His Doctrine written byApuleius may have been taken from the lectures of Gaius, but this assertion is now seen as dubious.^[7] The Middle Platonic anonymous commentary on theTheaetetus of Plato, which is partially extant, may also have come from his school.^[8]

• Armstrong, A. H. (April 1967).The Cambridge History of Later Greek and Early Medieval Philosophy. Cambridge University Press.ISBN 978-0-521-04054-9. Retrieved16 April 2023.
• Dillon, John (28 October 1993).Alcinous: The Handbook of Platonism. Clarendon Press.ISBN 978-0-19-159113-6. Retrieved16 April 2023.
• Dillon, John M. (1996).The Middle Platonists, 80 B.C. to A.D. 220. Cornell University Press.ISBN 978-0-8014-8316-5. Retrieved20 February 2023.
• Sandy, Gerald N. (1997).The Greek World of Apuleius: Apuleius and the Second Sophistic. Brill.ISBN 978-90-04-10821-9. Retrieved16 April 2023.
• Reale, Giovanni (1 January 1990).A History of Ancient Philosophy IV: The Schools of the Imperial Age. SUNY Press.ISBN 978-0-7914-0128-6. Retrieved16 April 2023.

• 2nd-century Greek philosophers
• Middle Platonists

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