Proclus

Proclus Lycius (8 February 412 to 17 April 485), called Proclus the Successor, was a Greek Neoplatonic philosopher and one of the last major philosophers of late antiquity. Born in Constantinople to a family from Lycia and raised at Xanthus, he studied rhetoric, philosophy and mathematics in Alexandria, learning mathematics from a teacher named Heron, before going to Athens in 431 to study at the Neoplatonic Academy under Plutarch of Athens and Syrianus. He succeeded Syrianus as head of the Academy in 437 and was himself succeeded by Marinus. His own system placed a level of individual ones, the henads, between the One and intelligible divinity, and his Elements of Theology sets out 211 propositions each followed by a proof. For the history of mathematics his most valuable work is the commentary on the first book of Euclid's Elements, which preserves a short sketch of early geometry taken from the lost History of Geometry by Eudemus of Rhodes and a Platonic account of the status of mathematical objects.