Foreign policy Magnus' rule brought about a change from the somewhat aggressive foreign policy of his father. In 1266 he gave up the Hebrides and the
Isle of Man to Scotland, in return for a large sum of silver and a yearly payment, under the
Treaty of Perth, by which the Scots at the same time recognised Norwegian rule over
Shetland and the
Orkney Islands. In 1269 the
Treaty of Winchester cemented good relations with the English king
Henry III. Magnus also seems to have had good relations with the Swedish King
Valdemar Birgersson, and in the 1260s, the border with
Sweden was officially defined for the first time. When Valdemar was deposed by his two brothers and fled to Norway in 1275, this stirred Magnus into gathering a
leidang-fleet for the first and only time in his reign. With a large fleet, he met with the new Swedish King
Magnus Ladulås to try to bring about a settlement between the two brothers, but without success, Magnus of Sweden would not give in to pressure and Magnus of Norway retreated without engaging in hostile actions.
Internal policies In internal politics, Magnus carried out a great effort to modernise the law-code, which gave him his epithet
law-mender. Magnus had several legal scholars and advisors to assist on this work, presumably
Audun Hugleiksson,
Askatin,
Tore Haakonson, and
Sturla Tordsson. The modernised law-codes were adopted at the
Things in the years 1274 (
Landslov) and 1276 (
Byloven). In 1274 he promulgated the new national law, known as
Magnus Lagabøtes landslov, a unified code of laws to apply for the whole country, including the
Faroe Islands and
Shetland. This replaced the different regional laws which had existed before. It was supplemented by a new municipal law (a law for the cities) in 1276,
Magnus Lagabøtes bylov, and a slightly modified version was also drawn up for
Iceland. A unified code of laws for a whole country was at this time something quite new, which had until then only been introduced in
Sicily and
Castile. His code introduced the concept that crime is an offense against the state rather than against the individual and thus narrowed the possibilities of personal vengeance. It increased the formal power of the king, making the throne the source of justice. The municipal law gave the cities increased freedom from rural control. A specific section fixed the law of succession to the throne, in accordance with the arrangements laid down by King Håkon Håkonsson in 1260. The royal succession was an important and prickly matter, the last of the civil wars, fought for decades over disputed successions to the throne, having finally ended only in 1240. In 1273 Magnus gave his eldest son, five-year-old
Eric, the title of king, and his younger brother
Håkon the title of
duke, thus making it unequivocally clear who would be his heir. Although Magnus was by all accounts a personally very pious king, his work with the law-codes brought him into conflict with the archbishop, who resisted temporal authority over the church, and sought to preserve the church's influence over the kingdom. The Tønsberg Concord (
Sættargjerden in Tønsberg) signed in 1277 between King Magnus and
Jon Raude,
Archbishop of Nidaros, confirmed certain privileges of the clergy, the freedom of episcopal elections and similar matters. The church preserved considerable independence in judicial matters, but gave up its old claim that the Norwegian kingdom was a
fief under the ultimate authority of the Catholic Church. In cultural terms Magnus continued his father's policy of introducing European courtly culture to Norway. In 1277 he replaced the old Norse titles
lendmann and
skutilsvein with the European titles
baron and
ridder (
knight), at the same time giving them certain extra privileges and the right to be addressed as
lord (
herre). Magnus is probably also the first Norwegian king to have named himself using an
ordinal number - he called himself "Magnus IV" (he did not count
Magnus Haraldsson (II) and
Magnus Sigurdsson (IV)). Immediately after his father's death, he commissioned the Icelander
Sturla Þórðarson to write his father's
saga, or biography. In 1278, he commissioned the same man to write his own saga. The
Saga of Magnus the lawmender (
Magnúss saga lagabœtis) thus became the last of the medieval Norwegian
kings' sagas; unfortunately, only a short fragment of it has been preserved. ==Death and aftermath==