Vikings begin their attacks on England
Viking settlers found the city of Dublin in Ireland
Rus Vikings attack Constantinople (Istanbul)
Danish Vikings establish a kingdom in York, England
Harald I gains control of Norway.
The Vikings raid along the Mediterranean coast.
Olav I conquers Norway and proclaims it a Christian kingdom
Christianity reaches Greenland and Iceland.
Olav I dies; Norway is ruled by the Danes.
Olav II regains Norway from the Danes.