The
Protestant Church in the Netherlands (, abbreviated
PKN) is the largest
Protestant Christian denomination in the
Netherlands, being both
Reformed (Calvinist) and
Lutheran. With 2,000 congregations and a membership of some 2.3 million (or 13.5 % of the Dutch population, 2009), it is the second largest church in the Netherlands after the
Catholic Church. Historically the various Protestant churches had collectively formed the largest Christian denomination in the country, with about 60% of the population being Protestant in the early 20th century, but religiosity drastically declined after the 1960s. It is the traditional faith of the
Dutch Royal Family – a remnant of the church's historical dominance.