In the context of Eastern enlargement and growing migration the issue of Europe’s religions is of particular interest. What is the role of religion in the integration processes within and between European societies? Having learned from their tragic experiences, Europe’s democratic societies have sought over the last two centuries to oust religion from the political sphere. It was not for nothing that it was viewed as a source of contention, rather than unity. This is certainly still often the case today. However, it may be that European religions also have the potential to bring the people of Europe closer together, instead of dividing them further. The contributions to the present volume take a close look at this issue. Particular attention is paid to the role of Islam in the European public sphere.