whose doctrine together with those of Plato and Plotinus was the one on which Western-Christian philosophy is based,till the Reform at least.
He also was an astrologist,mathematician and music theorist-which he managed to blend into his philosophy.
Greatly important person which why there're two house system by his name Porphyry and neo-Porphyry. While Placidus was falsely named as creator of system to make it look more credible while G.A.Magini was first to publish it,and there even ealier mentionings.