Magnus the Lawmender (1 or 3 May 1238 – 9 May 1280), also known as Magnus Haakonsson, was King of Norway from 1263 to 1280. One of his greatest achievements was the modernisation and nationalisation of the Norwegian law-code. He was the first Norwegian monarch known to have used an ordinal number, counting himself as Magnus IV. In modern sources, he is also known as Magnus VI.
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