  The historian George Pachymeres (1242–c. 1310), who also taught at the Patriarchal School, wrote a voluminous Aristotelian paraphrase-compendium covering not only logic and natural philosophy but also metaphysics and ethics, the Philosophia. In addition, he wrote a textbook on the four mathematical disciplines (the Quadrivium) and, more importantly, “exegetical” commentaries on four Aristotelian works, or groups of works, namely the Organon, the Physics, the Metaphysics and the Nicomachean Ethics, as well as the only Late Byzantine commentary on Plato, a continuation of Proclus’ incompletely transmitted commentary on the Parmenides, which contrasts starkly with its ancient predecessor by applying a “logical” (i.e., non-metaphysical) method of interpretation and a paraphrastic mode of exposition. A growing body of evidence shows that Pachymeres was deeply engaged in collecting, transcribing, and editing manuscripts of philosophical authors.