In the 16th century the Netherlands got split into two main religions. This reformation divided the country roughly diagonally across from the southwest to the northeast into Catholic and Protestant parts.The north part is Protestant whilst the south part is Catholic. The Protestant part is subdivided into different groups such as the Reformed Church, Orthodox and Lutherans. Nowadays, religion has little influence on the average Dutch population. The tradition of following parental religion has disappeared and many Catholics as well as Protestants abandoned their formal religion. During the last century immigration gave rise in an increase of Hindus and Muslims. Presently, there are around one million Muslims living in the Netherlands. This multiculturalism is founded on the Dutch constitution which provides and guarantees freedom of religion and belief.