Samenvatting

The first national research into church formation among Roman Catholic migrants in the Netherlands dates from the year 2006. Since then many changes took place within these communities. However, there is not a single institution that collects their addresses and data. Policymakers, scholars or journalists do not have access to recent information. Based on questions about their development and composition, this article updates information about these church communities and places them in a broader historical context. One of the most significant findings in this article concerns the stability of their regular parishioners, that contrasts with the national trend in Roman Catholic Church, which is constantly dealing with a declining amount of members.