I understand that as part of the treaty between Rollo and Charles the Simple, the Vikings would be given Normandy as long as they swore fealty to West Francia and converted to Christianity. However, I am also aware that the Christianization of Scandinavia was long and difficult. However, the Normans not only seemed to have adopted Christianity without enmity, they seemed to have really fallen in love with the religion since they built so many cathedrals and participated in crusades. Was the conversion really that smooth, or did the Normans retain any allegiance or faith with their old gods from the north, and if so, did that cause any problems in Normandy?