Spain also attempted a policy of strict religious uniformity for the Catholic Church within its domains, and enforced it with the Inquisition. The Reformation meanwhile produced a number of Protestant denominations, which gained followers in the Seventeen Provinces. These included the Lutheran movement of Martin Luther, the Anabaptist movement of the Dutch reformer Menno Simons, and the Reformed teachings of John Calvin. This growth led to the 1566 "Beeldenstorm", the "Iconoclastic Fury", in which many churches in northern Europe were stripped of their Catholic statuary and religious decoration.