sentences:  After the Reformation's introduction into the Duchy of Palatinate-Zweibrücken about 1537, all the villagers had to convert to Martin Luther’s teachings.Likewise, in 1586, at the Duke’s behest, there was a further conversion, this time to John Calvin’s teachings.Only after the Thirty Years' War were the people allowed to embrace Catholicism or Lutheranism once again, if Calvinism did not suit them.