In ancient Greece, the academy or college of philosophy developed by Socrates and Plato, located just northwest of Athens. Plato acquired property there about 387 BC and used it as a training ground and to teach. At the site had been a park and gymnasium sacred to the legendary Attic hero Academus. The term Academy was not applied during Plato's time but rather to his successors till the time of Cicero (106-43 BC). It was organized for worshipping the muses and instruction included mathematics, dialectics, natural science, and political science. It was closed by the emperor Justinian in 529 AD.