The IERS baseline study of religious education (RE) in the five partner countries, i.e. Denmark, France, Germany, Italy, and Spain, maps and analyses how religion and teaching religion is played out in official curricula for RE or in other school subjects, primarily in upper-secondary school. In addition, the baseline study also highlights the most recent and important supranational European recommendations for the implementation in the nation states of Europe of a kind of RE that may contribute to intercultural understanding, tolerance and a constructive handling of religious and cultural diversity and conflict.