 However, in 1588, when Duke Johannes I ordered a further conversion of all his subjects in Palatinate-Zweibrücken, this time to John Calvin’s Reformed beliefs, the Counts of Leyen opposed the policy's imposition within their own lordly landholds, and thus the people of the dale remained Lutheran, although they were still ecclesiastically bound to the Dukes of Zweibrücken.During the Thirty Years' War and in the decades that followed, among newcomers who came to settle in the region's now mostly empty villages were many Catholics, though the general tolerance of the Catholic faith came only during French King Louis XIV's wars of conquest.The King favoured the immigration of Catholic Christians through his population policy, and the French also reintroduced Catholic church services in Glan-Münchweiler.