990-1035

Cnut also known as Cnut the Great and Canute, was King of England from 1016, King of Denmark from 1018, and King of Norway from 1028 until his death in 1035. The three kingdoms united under Cnut's rule are referred to together as the North Sea Empire.
He has been referred to as "the most effective king in Anglo-Saxon history".
As a Danish prince, Cnut won the throne of England in 1016 in the wake of centuries of Viking activity in northwestern Europe. His later accession to the Danish throne in 1018 brought the crowns of England and Denmark together. Cnut sought to keep this power-base by uniting Danes and English under cultural bonds of wealth and custom. After a decade of conflict with opponents in Scandinavia, Cnut claimed the crown of Norway in Trondheim in 1028. The Swedish city Sigtuna was also held by Cnut. In 1031, Malcolm II of Scotland also submitted to him, though Anglo-Norse influence over Scotland was weak and ultimately did not last by the time of Cnut's death.