Robert Holcot ( 1349), active at Oxford in the years following William of Ockham's departure, has been the subject of renewed interest partly due to the exceptional success of his work on Wisdom, a bestseller until the 17th century. This volume offers an analysis of his unedited theological questions, a critical edition of which has been a desideratum for many years. This varied corpus, hitherto mistakenly considered to consist solely of 'quodlibetic questions', sheds light on the scholarly practices of the network of theologians who, around Holcot, disputed these questions at Oxford in the 1330s, at the origin of the nominalist turn in theology. Here we see at first hand the shifting boundary between secular knowledge and religious beliefs, the intertwining of scholarly rationality and scholastic reason at work in the medieval university. Several texts are published here: the Introitus in Mattheum, the Determinationes II and IV, question 7 of the Quodlibet B on the halo of the doctors and two short questions on the guardian angels. Contributors to this volume: Pascale Bermon, Joel Biard, Michael W. Dunne Christophe Grellard, Dominique Poirel, Amandine Postec, Chris Schabel, John T. Slotemaker, Jacques Verger