title: Christianization of Scandinavia
context: The Christianization of Scandinavia as well as other Nordic countries and the Baltic countries, took place between the 8th and the 12th centuries. The realms of Scandinavia proper, Denmark, Norway and Sweden (Sweden is an 11th or 12th century merger of the former countries Götaland and Svealand[1]), established their own Archdioceses, responsible directly to the Pope, in 1104, 1154 and 1164, respectively. The  conversion to Christianity of the Scandinavian people required more time, since it took additional efforts to establish a network of churches. The Sami remained unconverted until the 18th century.[2] Newer archaeological research suggests there were Christians in Götaland already during the 9th century, it is further believed Christianity came from the southwest and moved towards the north.[3]
question: When was Christianity introduced in Scandinavia?
answers: between the 8th and the 12th centuries