when did the vikings attack the monastery at lindisfarne
Lindisfarne In 793, a Viking raid on Lindisfarne[37][d] caused much consternation throughout the Christian west and is now often taken as the beginning of the Viking Age. The D and E versions of the Anglo-Saxon Chronicle record:
House of Knýtlinga In 1013 Sweyn Forkbeard, already the king of Denmark and of Norway, overthrew King Æthelred the Unready of the House of Wessex. Sweyn had first invaded England in 1003 to avenge the death of his sister Gunhilde and many other Danes in the St. Brice's Day massacre, which had been ordered by Æthelred in 1002.