The Saga of Olaf Kyrre (in the Old Norse Heimskringla cycle) has an interesting account of king Haakon I’s(920-961) attempt to impose Christianity in Norway. In chapter 15, we find out that…
“King Hakon was a good Christian when he came to Norway; but as the whole country was heathen, with much heathenish sacrifice, and as many great people, as well as the favour of the common people, were to be conciliated, he resolved to practice his Christianity in private.
But he kept Sundays, and the Friday fasts, and some token of the greatest holy-days.
He made a law that the festival of Yule should begin at the same time as Christian people held it, and that every man, under penalty, should brew a meal of malt into ale, and therewith keep the Yule holy as long as it lasted. Before him, the beginning of Yule, or the slaughter night, was the night of mid-winter (Dec. 14), and Yule was kept for three days thereafter.
It was his intent, as soon as he had set himself fast in the land, and had subjected the whole to his power, to introduce Christianity.
He went to work first by enticing to Christianity the men who were dearest to him; and many, out of friendship to him, allowed themselves to be baptized, and some laid aside sacrifices. He dwelt long in the Throndhjem district, for the strength of the country lay there; and when he thought that, by the support of some powerful people there, he could set up Christianity he sent a message to England for a bishop and other teachers; and when they arrived in Norway, Hakon made it known that he would proclaim Christianity over all the land.
The people of More and Raumsdal referred the matter to the people of Throndhjem. King Hakon then had several churches consecrated, and put priests into them; and when he came to Throndhjem he summoned the bondes to a Thing, and invited them to accept Christianity. They gave an answer to the effect that they would defer the matter until the Frosta-thing, at which there would be men from every district of the Throndhjem country, and then they would give their determination upon this difficult matter.”