Magnus I (1024 - October 25, 1047) was a King of Norway (1035 - 1047) and king of Denmark (1042 - 1047). He was the son of Saint Olaf, and was known as the Good or the Noble.

In the period from 1028 to 1035, he was forced to leave Norway, but after the death of King Canute, he was called back by Norwegian noblemen, who were tired of being under Danish rule. After the death of Harthacanute, he was also made king of Denmark, despite the rival claims of Svend Estridsen, who was the son of Estrid, sister of Canute. There was great tormoil south of the Danish border, and in 1043 Magnus won an important victory at Lyrskov Hede. This is said to be the victory that earned him his surname.

His rival, Svemd Estridsen, did not give up, however, and there were numerous conflicts between them. A settlement was agreed to, making Svend Earl of Denmark. Magnus also had trouble in Norway, where his uncle, Harald Hardråde, tried to seize power. In 1046, Magnus was forced to share power with Harald. In 1047, Svend Estridsen was driven out of Denmark with the assistance of Swedish king Anund Jacob. Svend could not muster enough support, and was forced to flee to Scania. Magnus died in 1047 after a fall from his horse. On his deathbed, he proclaimed Svend as his heir in Denmark, and Harald his heir in Norway. His body was brought to Norway, and he was buried in the cathedral in Trondheim, where his father was also buried.

References

• Translated from the article in the Danish Wikipedia