Book excerpt: The increased interest in religion as a phenomenon and its various cultural contexts is encouraging a focus on the relationship between religion and politics. However, the political relevance of the religious and the interdependence between political and religious spheres has always been a major area of medieval research. The articles in this volume consider not only the principle inseparability of both spheres as previously established by research, but also the beginnings of a differentiation and relative autonomy of religion and politics within the framework of a comparison between Germany and the United Kingdom. This allows the identification of restrictions within the research traditions that are due to national histories and points to ways of overcoming these restrictions.