Sweyn II "Estridsson" (1020-1074) was King of Denmark 1047-74. Was the son of Sweyn I "Forkbeard"s daughter Estrid. Fought Harald Hardarada I a long war until 1064 when Harald relinquished his claims to Denmark. After that Sweyn begun to buld a strong foundation for royal power through cooperation with the church. He completed the final partition of Denmark in to dioceses.