The Christianization of Sweden began in the 9th century and continued into the 12th century. Initially influenced by missionaries from neighboring countries, such as Denmark and Norway, the process involved the gradual conversion of the local population from Norse paganism to Christianity. Key figures, like Ansgar, played significant roles in spreading the Christian faith through preaching and establishing churches. By the late 11th century, Sweden saw the establishment of a more organized church structure, with the first bishopric founded in Skara. The conversion was often met with resistance, but over time, Christianity became the dominant religion, leading to significant cultural and social changes in Swedish society.