 His most famous teachings were his commentaries on the "Sentences" at the University of Paris.It is likely that Marchia's lectures were transcribed by his students, which he edited resulting in several versions of his commentary in manuscript form.Before leaving for Avignon around 1324 to teach at a Franciscan convent, Marchia composed several scholarly commentaries, including two on "Aristotle's Metaphysics" and one on "Physics".