Sweyn III, also known as Sweyn Grathe, was a king of Denmark who reigned from 1047 to 1076. He was a member of the House of Knýtlinga, a royal family descended from Sweyn Forkbeard, the first Danish king of England. Sweyn III's reign was marked by internal conflicts and struggles for power among the Danish nobility. During his rule, Sweyn III faced challenges from rival factions, including the powerful Harthacnut and Magnus the Good. His leadership was characterized by attempts to consolidate power and maintain stability in Denmark. Despite these efforts, his reign was tumultuous, reflecting the complexities of medieval Scandinavian politics.