On Aristotle's "Metaphysics 13–14"Syrianus, originally from Alexandria, moved to Athens and became the head of the Academy there after the death of Plutarch of Athens. Syrianus attacked Aristotle in his commentary on Books 13 and 14 of the "Metaphysics", just as his pupil Proclus was to do later in his commentaries on Plato. This is because in "Metaphysics 13 14", Aristotle himself was being thoroughly polemical towards Platonism, in particular against the Academic doctrine of Form