Neoplatonism is a modern term used to designate a tradition of philosophy that arose in the 3rd century AD and persisted until shortly after the closing of the Platonic Academy in Athens in AD 529 by Justinian I. Neoplatonists were heavily influenced by Plato, but also by the Platonic tradition that thrived during the six centuries which separated the first of the Neoplatonists from Plato.