allowed the Old Lutherans to form separate free church associations with only nominal government control. From the religious point of view of the typical Catholic or Protestant, major changes were underway in terms of a much more personalised religiosity that focused on the individual more than the church or the ceremony. Opposing the rationalism of the late 18th century, there was a new emphasis on the psychology and feeling of the individual, especially in terms of contemplating sinfulness, redemption, and the mysteries and the revelations of Christianity. Pietistic revivals were common among Protestants. Among Catholics there was a sharp increase in popular pilgrimages. In 1844 alone, half a million pilgrims made a pilgrimage to the city of Trier in the Rhineland to view the Seamless robe of Jesus, said to be the robe that Jesus wore on the way to his crucifixion. Catholic bishops in Germany had historically been largely independent of Rome, but now the Vatican exerted increasing control, a new "ultramontanism" of Catholics highly loyal to Rome. A sharp controversy broke out in 1837–38 in the largely Catholic Rhineland over the religious education of children of mixed marriages, where the mother was Catholic and the father Protestant. The government passed laws to require that these children always be raised as Protestants, contrary to Napoleonic law that had previously prevailed and allowed the parents to make the decision. It put the Catholic Archbishop under house arrest. In 1840, the new King Frederick William IV sought reconciliation and ended the controversy by agreeing to most of the Catholic demands. However Catholic memories remained deep and led to a sense that Catholics always needed to stick together in the face of an untrustworthy government. Kulturkampf and the German Empire (1871–1918) Chancellor Otto von Bismarck would not tolerate any base of power outside Germany and launched the Kulturkampf ("culture war") against the power of the pope and the Catholic Church. This gained strong support from German liberals, who saw the Catholic Church as the bastion of reaction and their greatest enemy. The Catholic element, in turn, saw the National Liberals as its worst enemy and formed the Center Party. Catholics, although about a third of the national population, were seldom allowed to hold major positions in the Imperial government or the Prussian government. After 1871, there was a systematic purge of Catholics; in the powerful interior ministry, which handled all police affairs,