Christianity, first preached in Sweden about the year 830, brought with it a diminution of the people's rights. When the episcopal dioceses were first marked out, the people naturally kept in their own hands the right to choose their spiritual rulers, who were designated _lydbiskopar_, or the people's bishops. But in 1164 the Court of Rome succeeded in establishing, under its own authority, an archbishopric at Upsala; and by a papal bull of 1250 the choice of Swedish bishops was taken from the people and confided to the cathedral chapters under the supervision of the pope. As soon as the whole country became converted, the piety of the people induced them to submit to gross impositions at the hands of those whom they were taught to regard as God's representatives on earth. In 1152 the so-called "Peter's Penning" was established, an annual tax of one penning from every individual to the pope. Besides this, it became the law, soon after, that all persons must pay a tenth of their annual income to the Church, and in addition there were special taxes to the various bishops, deans, and pastors. A still more productive source of revenue to the Church was death-bed piety, through which means a vast amount of land passed from kings or wealthy individuals to the Church. By a law of the year 1200 the clergy were declared no longer subject to be tried for crime in temporal courts; and by the end of the thirteenth century the Church had practically ceased to be liable for crown taxation. It requires but a moment's thought to perceive how heavy a burden all these changes threw on the body of the nation.