 The works which have survived are his commentaries upon Aristotle's "de Caelo", "Physica Auscultatio", and "Categories", as well as a commentary upon the "Enchiridion of Epictetus".There is also a commentary on Aristotle's "de Anima" under his name, but it is stylistically inferior and lacks the breadth of historical information usually used by Simplicius.It has been suggested that it was written by Priscian of Lydia, but other scholars see it as authentic.