In historiography, there are exceedingly contradictory evaluations of the "long 19th century" with regard to the development of religiosity, the relationship between the state and the churches as well as mutual relations between individual religious communities. Was it the most ecclesiastical century or did the French Revolution began an unstoppable process of retreat of religion from the "theatre" of history? Can we agree with the opinion that the 19th century brought about the onset of the second confessionalisation in Europe?