Platonic Academy
Neo-Platonism was a mystical or contemplative form of Platonism, which "developed outside the mainstream of Academic Platonism." It started with the writings of Plotinus (204/5–270), and ended with the closing of the Platonic Academy by Emperor Justinian in 529 AD, when the pagan traditions were ousted. It is a product of Hellenistic syncretism, which developed due to the crossover between Greek thought and the Jewish scriptures, and also gave birth to Gnosticism. Proclus was the last head of the Platonic Academy; his student Pseudo-Dinosysius had a far-stretching Neo-Platonic influence on Christianity and Christian mysticism.