The project “Religious Education at Schools in Europe” (REL-EDU), which is divided up into six volumes, aims to research the situation with regard to religious education in Europe. At a time when educational issues have increasingly come to determine the social and political discourse and major reforms of the education system are being discussed and implemented, and when migration has become a significant phenomenon, contributing to changes in the religious landscape of the European continent, it is highly appropriate to focus our attention on the concrete situation regarding religious education. This book package consists of “Part 1: Central Europe” (Austria, Croatia, Czech Republic, Germany, Hungary, Poland, the Principality of Liechtenstein, Slovakia, Slovenia and Switzerland), “Part 2: Western Europe” (England, Ireland, Northern Ireland, Scotland, Wales, Belgium, France, Luxembourg, Netherlands), “Part 3: Northern Europe” (Denmark, Sweden, Finland, Norway, Estonia, Lithuania, Latvia, Iceland), “Part 4: Eastern Europe” (Armenia, Azerbaijan, Belarus, Georgia, Republic of Moldova, Russian Federation and Ukraine), “Part 5: Southeastern Europe” (Albania, Bosnia and Herzegovina, Bulgaria, Kosovo, Republic of North Macedonia, Montenegro, Romania, Serbia and Turkey), “Part 6: Southern Europe” (Republic of Cyprus, Greece, Italy, Malta, Portugal, Spain, Andorra, Monaco, and San Marino).