section_path: History/High Middle Ages
section_name: High Middle Ages
paragraph_text: High Middle Ages
  
  From the 1040s to 1130, the country was at peace. In 1130, the civil war era broke out on the basis of unclear succession laws, which allowed the king's sons to rule jointly. The Archdiocese of Nidaros was created in 1152 and attempted to control the appointment of kings. The church inevitably had to take sides in the conflicts. The wars ended in 1217 with the appointment of Håkon IV Håkonsson, who introduced clear laws of succession.
  
  From 1000 to 1300, the population increased from 150,000 to 400,000, resulting both in more land being cleared and the subdivision of farms. While in the Viking Age farmers owned their own land, by 1300, seventy per cent of the land was owned by the king, the church, or the aristocracy, and about twenty per cent of yields went to these landowners.
  
  The 14th century is described as Norway's golden age, with peace and increase in trade, especially with the British Islands, although Germany became increasingly important towards the end of the century. Throughout the High Middle Ages, the king established Norway as a sovereign state with a central administration and local representatives.
  
  In 1349, the Black Death spread to Norway and within a year killed a third of the population. Later plagues reduced the population to half the starting point by 1400. Many communities were entirely wiped out, resulting in an abundance of land, allowing farmers to switch to more animal husbandry. The reduction in taxes weakened the king's position, and many aristocrats lost the basis for their surplus. High tithes to church made it increasingly powerful and the archbishop became a member of the Council of State.
  
  The Hanseatic League took control over Norwegian trade during the 14th century and established a trading centre in Bergen. In 1380, Olaf Haakonsson inherited both the Norwegian (as Olaf IV) and Danish thrones (as Olaf II), creating a union between the two countries. In 1397, under Margaret I, the Kalmar Union was created between the three Scandinavian countries. She waged war against the Germans, resulting in a trade blockade and higher taxation on Norwegian goods, which led to a rebellion. However, the Norwegian Council of State was too weak to pull out of the union.
  
  Margaret pursued a centralising policy which inevitably favoured Denmark because of its greater population. Margaret also granted trade privileges to the Hanseatic merchants of Lübeck in Bergen in return for recognition of her rule, and these hurt the Norwegian economy. The Hanseatic merchants formed a state within a state in Bergen for generations. The " Victual Brothers " launched three devastating pirate raids on the port (the last in 1427).
  
  Norway slipped ever more to the background under the Oldenburg dynasty (established 1448). There was one revolt under Knut Alvsson in 1502. Norway took no part in the events which led to Swedish independence from Denmark in the 1520s.