Simmias of Thebes appears as a main discussion partner in a dialogue from the man who founded what?
Simmias of Thebes: Simmias of Thebes (Greek: Σιμμίας Θηβαῖος ; fl. Simmias of Thebes:  He appears in Plato's "Phaedo" as a main discussion partner of Socrates alongside Cebes, as well as "Crito", "Phaedrus", and "Epistile" "XIII". Plato: Plato ( ; Greek: Πλάτων "Plátōn", ] in Classical Attic; 428/427 or 424/423 – 348/347 BC) was a philosopher in Classical Greece and the founder of the Academy in Athens, the first institution of higher learning in the Western world.
the Academy in Athens