Sweyn I of Denmark (The Danish North Sea)

Sweyn I (960-1017) reigned as the King of Denmark from 986 to his death in 1017.

During the mid-980's, Sweyn revolted against and overthrew his father, King Harold I. According to a conflicting account by Adam of Bremen, Sweyn was a religious pagan who oppressed Christians and expelled German bishops from Denmark. Adam's account is highly disputed, since he claimed that Sweyn was usurped by King Eric of Sweden, even though this story is considered to be a falsehood by scholars.

In 1014, Sweyn lead the armies of Denmark and invaded England, overthrowing the King and annexing eastern England. During the last years of his reign, Sweyn worked on establishing his hold on England, crushing two revolts against his rule and promoting Danish law and culture in England. Sweyn fell ill on a journey back home in Denmark and died in Copenhagen.