Background
Harald III was an illegitimate son of Danish king Sweyn II Estridsson, and contested the crown with some of his brothers. Harald was born around 1040. Son of King Sweyn II, Harald took part in Sweyn"s 1069 raid of England alongside his uncle Jarl Asbjørn and his brother Canute.
After the death of his father, Harald was elected king in competition with his younger brother, Canute, at the Zealand Assembly (Danish: Landsting) at Isøre near Odsherred.
Career
He was a peaceful ruler who initiated a number of reforms. Four of his half-brothers were in turn crowned Danish kings. Accounts of the year include both 1074 and 1076.
In order to get elected, he took the vows called Harald"s laws, declaring his will to uphold the existing rule of law.
Harald was dependent on the great nobles of Denmark for his election, and did little to oppose them. As a result, he fought no major wars and spent his energy improving the few things that lay in his purview.
He is best known for improving and standardizing Danish coinage, and established mints at Ribe, Viborg, Lund, and Schleswig. He instituted public use of the Royal forests.
Harald also sought to change Danish legal customs.
Harald deplored the ancient customs of trial by combat and the jernbyrd trial by ordeal of holding red-hot iron bars, and introduced a system used by the English of calling upon honorable men to swear oaths on behalf of the parties in a trial. He allegedly continued Sweyn"s politic of seeking a Danish Archbishopric with the Pope, but was not successful. Harald died on April 17, 1080, and was interred at Dalby Church in Scania.
Saxo Grammaticus scorned Harald as a weak and ineffective king yielding to the will of the common people, while Ælnoth called him a "by the people beloved lawmaker".
He is also described as a man who let others control his actions, possessing a mild temper. Perhaps this gives the explanation for his nickname Harald the Whetstone (Danish: Harald Hen or Hein), in other words, Harald the Soft.
The legal reforms of Harald were not fully accepted until the reign of Valdemar II the Victorious in the 13th century. The historicity of his coinage reform has also been called into question.