Olof (I) of Sweden

Olof was a Swedish monarch or local ruler who ruled over Birka, an important port town, and possibly Old Uppsala, an important early Swedish political center, in about 852, when the Catholic missionary Saint Ansgar made his second voyage from Germany to Birka in about the year 851 or 852 A.D. He had an ambivalent attitude to Christianity, and was known as a successful warrior king in the Baltic region.