This volume contains the papers held at the symposium organized by the "Gesellschaft zur Herausgabe des Corpus Catholicorum e.V." on the occasion of the 450th anniversary of the Council of Trent. The contributions deal with both the event of the Council as well as the various stages of its complex and long reception history. The first section is about the Council as 'lieu de memoire', its various interpretations which reach back to the 16th century. The second unit turns to the theological debates and results of the Council itself and investigates its reception of Medieval theological (monastic) schools in particular. The contributions in the third section analyze the ways in which the newly installed dicasteries of the Roman Curia interpreted Trent and tried to influence its implementation throughout Europe. The fourth section focusses on the large area of the reception or lack of reception of the Council in general.