It is not uncommon for metaphysicians today to see the constraints of the Catholic teaching on the Blessed Sacrament as severely limiting (if not wholly debilitating) to any philosophical project. However, for medieval scholars, Eucharistic conversion helped to provide a critical test case for the nature of a substance by offering an example in which an individuated body could be present somewhere without any accidents. This panel seeks to explore the influence that this doctrine had on the larger works of individuals such as Aquinas, Scotus, Ockham, and Buridan. Doing so offers a glimpse into the complex relationship between Christian dogma and philosophical discovery in the mid to late medieval world.Chair: Cody Warta (University of St Andrews) Speakers:John Peck (St Louis University), Concomitance and the Eucharist in Francisco SuárezGyula Klima (Fordham University), Moving away from ‘the modistic principle’ toward the separation of secular and religious discourse: The case of Aquinas, Scotus, Ockham, and Buridan on the persistence of Eucharistic speciesRichard Cross (University of Notre Dame), Hervaeus Natalis and the Early Thomist School on Separated Accidents Peter King (University of Toronto), TBA