From 1568, La Rochelle became a centre for the Huguenots, and the city declared itself an independent Reformed Republic on the model of Geneva. During the subsequent period, La Rochelle became an entity that has been described as a "state within a state". This led to numerous conflicts with the Catholic central government. The city supported the Protestant movement of William of Orange in the Netherlands, and from La Rochelle the Dutch under Louis of Nassau and the "Sea Beggars" were able to raid Spanish shipping.