The Viking Age was a period of considerable religious change in Scandinavia. Part of the popular image of the Vikings is that they were all pagans, with a hatred of the Christian Church, but this view is very misleading.
http://www.bbc.co.uk/history/ancient/vikings/religion_01.shtml
The Viking Age is the period A.D. 793–1066 in European history, especially Northern European and Scandinavian history, following the Germanic Iron Age.
https://en.wikipedia.org/wiki/Viking_Age
The Viking Age settlements in Greenland were established in the sheltered fjords of the southern and western coast. They settled in three separate areas along approximately 650 kilometres (350 nautical miles; 400 statute miles) of the western coast.
https://en.wikipedia.org/wiki/Viking_Age
It is true that almost the entire population of Scandinavia was pagan at the beginning of the Viking Age, but the Vikings had many gods, and it was no problem for them to accept the Christian god alongside their own.
http://www.bbc.co.uk/history/ancient/vikings/religion_01.shtml
In the ninth century, Scandinavians (mainly Norwegians) began to colonize Iceland, an island in the North Atlantic where no one had yet settled in large numbers. By the late 10th century, some Vikings (including the famous Erik the Red) moved even further westward, to Greenland.
http://www.history.com/topics/exploration/vikings-history
Conversion in Scandinavia. Rune-stone from Jelling, showing the figure of Christ on the cross. © Attempts to convert Scandinavia began even before the Viking Age. The Anglo-Saxon St Willibrord led a mission to Denmark in 725, but although he was well-received by the king, his mission had little effect.
http://www.bbc.co.uk/history/ancient/vikings/religion_01.shtml
Introduction. From around A.D. 800 to the 11th century, a vast number of Scandinavians left their homelands to seek their fortunes elsewhere. These seafaring warriors–known collectively as Vikings or Norsemen (“Northmen”)–began by raiding coastal sites, especially undefended monasteries, in the British Isles.
http://www.history.com/topics/exploration/vikings-history
For several decades, the Vikings confined themselves to hit-and-run raids against coastal targets in the British Isles (particularly Ireland) and Europe (the trading center of Dorestad, 80 kilometers from the North Sea, became a frequent target after 830).
http://www.history.com/topics/exploration/vikings-history
As well as conversion abroad, the Viking Age also saw a gradual conversion in Scandinavia itself, as Anglo-Saxon and German missionaries arrived to convert the pagans. By the mid-11th century, Christianity was well established in Denmark and most of Norway.
http://www.bbc.co.uk/history/ancient/vikings/religion_01.shtml
End of the Viking Age. The events of 1066 in England effectively marked the end of the Viking Age. By that time, all of the Scandinavian kingdoms were Christian, and what remained of Viking “culture” was being absorbed into the culture of Christian Europe.
http://www.history.com/topics/exploration/vikings-history
when did viking age began
Viking age began in A.D. 793. Viking Age began in A.D. 793.