Over the past fifteen years Francis of Marchia (fl. 1320) has finally begun to receive the kind of attention his contemporary Franciscan confreres John Duns Scotus, Peter Auriol, and William of Ockham have enjoyed for decades. Marchia, a master of theology at the University of Paris, has emerged as an exciting thinker who made original contributions in areas ranging from modal theory to trinitarian theology. This volume capitalizes on the studies on and critical editions of the works of Marchia published since 1991, treating some of his often distinct and influential doctrines in cosmology, physics, metaphysics, ethics, and politics, based on his three main works: his commentaries on the Sentences and Aristotle’s Metaphysics and his Improbatio written against Pope John XXII. Contributors include: Fabrizio Amerini, Russell L. Friedman, Roberto Lambertini, Andrea Robiglio, Chris Schabel, Mark Thakkar, and Fabio Zanin.