Secularization
Secularization, or the decline in religiosity, first became noticeable after 1960 in the Protestant rural areas of Friesland and Groningen. Then, it spread to Amsterdam, Rotterdam and the other large cities in the west. Finally the Catholic southern areas showed religious declines. A countervailing trend is produced by a religious revival in the Protestant Bible Belt, and the growth of Muslims and Hindu communities resulting from immigration and high fertility levels.
Read more about this topic: Protestant Church In The Netherlands