The son of a wealthy and noble family, Plato (427-347 B.C.) was preparing for a career in politics when the trial and eventual execution of Socrates (399 B.C.) changed the course of his life. He abandoned his political career and turned to philosophy, opening a school on the outskirts of Athens dedicated to the Socratic search for wisdom. Plato's school, then known as the Academy, were the first university in western history and operated from 387 B.C. until A.D. 529, when it was closed by Justinian.