sentences:  In 1556, Elector Palatine Ottheinrich introduced the Reformation according to Martin Luther’s teachings, whereafter Ottheinrich’s successor, Elector Palatine Friedrich III decreed the stricter, Reformed version of Protestantism, Calvinism, as outlined by the 1563 Heidelberg Catechism, and until the end of the Thirty Years' War, under the principle of "cuius regio, eius religio", all his subjects had to adopt that faith.Among the newcomers who came to repopulate the village after the wars of the 17th century were Catholics, and some Lutherans, too.The differences between the two Protestant denominations were swept aside with the 1818 Palatine Union, which united the two churches.