Religion and religious diversity are disputed across many European societies. A new, publicly available database produced by researchers of the University of Lucerne offers more intelligence on religious affiliation. In most European countries, the religious composition of its population is remarkably stable. However, Eastern and Western countries are drifting apart somewhat in recent times. In general, a trend of pluralisation prevails in Western Europe, whereas influential Eastern countries are becoming more homogeneous in terms of religious affiliation.