The revival of Platonism, as the dominant philosophy of the Greco-Roman world, from the middle of the third century to the closing of the philosophical schools of Athens in 529. It was given its definitive form by Plotinus (204-70). The more ardent Neo-Platonists influences gradually made themselves felt in Catholic theology. Besides Synesius (370-414) and Dionysius (c. 500), Sts. Anselm and Bonaventure and other Scholastic philosophers, of the thirteenth century, were influenced by Neo-Platonism.