King of England from 1016, Denmark from 1018, and Norway from 1028. Having invaded England in 1013 with his father, Sweyn, king of Denmark, he was acclaimed king on Sweyn's death in 1014 by his Viking army. Canute defeated Edmund (II) Ironside at Assandun, Essex, in 1016, and became king of all England on Edmund's death. He succeeded his brother Harold as king of Denmark in 1018, compelled King Malcolm to pay homage by invading Scotland in about 1027, and conquered Norway in 1028. He was succeeded by his illegitimate son Harold I.
Under Canute's rule English trade improved, and he gained favour with his English subjects by sending soldiers back to Denmark. The legend of Canute disenchanting his flattering courtiers by showing that the sea would not retreat at his command was first told by Henry of Huntingdon in 1130
Canute and Edmund Ironside split up England, and Canute ruled Mercia and Northumbria until he inherited the whole kingdom. The empire collapsed on his death. He was buried at Winchester (britroyals.com)