When did Plato start the Academy?
Platonic Academy
Plato's immediate successors as "Scholarch" of the Academy were Speusippus (347–339 BC), Xenocrates (339–314 BC), Polemo (314–269 BC), and Crates (c. 269–266 BC). Other notable members of the Academy include Aristotle, Heraclides, Eudoxus, Philip of Opus, and Crantor.