had met resistance from pagan leaders and soon abandoned the idea. Anglo-Saxon missionaries from England and Germany had tried to convert Norwegians to Christianity but only had limited success. However, they succeeded in converting Olaf I of Norway to Christianity. Olaf II of Norway (later Saint Olaf) had more success in his attempts to convert the population with many Norwegians converting in the process, and he is credited with Christianizing Norway. The Christians in Norway often established churches or other holy sites at places that had previously been sacred under the Norse religion. The spread of conversion can be measured by burial sites as Pagans were buried with grave goods while Christians were not. Christianity had become well established in Norway by the middle of the 11th century and had become dominant by the middle of the 12th century. Stave churches were built of wood without the use of nails in the 13th century. From the Reformation to the present The Norwegians were Catholics until the Danish king Christian III of Denmark ordered Denmark to convert to Lutheranism in 1536 and, as Norway was then ruled by Denmark, the Norwegians converted as well. The Danish Church Ordinance was introduced in 1537 and a Norwegian Church Council officially adopted Lutheranism in 1539. Monasteries were dissolved and church property confiscated with the Evangelical Lutheran Church of Norway established and funded by the state. Bishops still adhering to Catholicism were deposed, with Olav, Archbishop of Nidaros, fleeing the country in 1537 and another bishop dying in prison in 1542. Catholicism held on in remote parts of Norway for another couple of decades, although eventually the remaining Catholics converted or fled, to the Netherlands in particular. Many pastors were replaced with Danes and Norwegian clergy being trained at the University of Copenhagen as Norway did not have a university. The Danish translation of the Bible was used as were Danish catechisms and hymns. The use of Danish in religious ceremonies had a strong influence on the development of the Norwegian language. The church undertook a program to convert the Sámi in the 16th and 17th centuries with the program being largely successful. The University of Oslo was established in 1811 allowing priests to train in Norway. The Norwegian Constitution of 1814 did not grant religious freedom as it stated that Jews and Jesuits were denied entrance in Norway. Moreover, adherence to Lutheran Christianity was