Isidore of Alexandria (/ˈɪzᵻˌdɔːr/ or /ˈɪzᵻˌdoʊr/; or Isidorus /ˌɪzᵻˈdɔːrəs/ or /ˌɪzᵻˈdɒrəs/, Greek: Ἰσίδωρος ὁ Ἀλεξανδρεύς; c. 450 – c. 520) was an Egyptian or Greekphilosopher and one of the last of the Neoplatonists. He lived in Athens and Alexandria toward the end of the 5th century AD. He became head of the school in Athens in succession to Marinus, who followed Proclus.