In primum Euclidis Elementorum librum commentarii

Proclus Lycius (; 8 February 412 CE – 17 April 485 CE), called Proclus the Successor (Ancient Greek: Πρόκλος ὁ Διάδοχος, Próklos ho Diádokhos), was a Greek Neoplatonic philosopher, one of the last major classical philosophers of late antiquity.