"Olof Skötkonung, (old norse: Óláfr skautkonungr) sometimes stylized as Olaf the Swede (c. 980–1022), was King of Sweden, son of Eric the Victorious and, according to Icelandic sources, Sigrid the Haughty. He succeeded his father in c. 995. He stands at the threshold of recorded history, since he is the first Swedish ruler about whom there is substantial knowledge. He is regarded as the first king known to have ruled both the Swedes and the Geats. In Sweden, the reign of king Olov Skötkonung (c. 995–1022) is considered to be the transition from the Viking age to the Middle Ages, because he was the first Christian king of the Swedes, who were the last to adopt Christianity in Scandinavia. He is associated with a growing influence of the church in what is today southwestern and central Sweden. Norse beliefs persisted in parts of Sweden until the 12th century." - (en.wikipedia.org 11.08.2021)