The scholarship of Leo Kenis has been characterised by methodological rigour and a broad-ranging interest in the history of church, theology and religion in the 19th and the 20th centuries. His most valued contributions concern the history of the Louvain Faculty of Theology, the crises of Modernism and Nouvelle theologie, the Second Vatican Council and the post-conciliar transformations of the Catholic Church in Belgium and Western Europe. This volume collects twenty-five contributions from Louvain and international colleagues working in the same field of expertise, who are all familiar with the research of Leo Kenis. Four domains of his expertise are addressed in this volume: the history of the (Ancient) Louvain Faculty of Theology, the Modernist Crisis, the history of religious orders abroad, and at home and the preparation and implementation of the Second Vatican Council. These contributions honour and extend the research of Leo Kenis as a Louvain scholar in religious history.