Magnus III Birgersson (1240–1290), usually called Magnus Ladulås (Magnus Barnlock), was
king of
Sweden from 1275 until his death in 1290.He is the first
Magnus to rule Sweden so that posterity recognizes him as legitimate king and not generally regarded as a usurper or a pretender (but third Magnus to have been proclaimed Sweden's king and ruled there). Later historians ascribe his epithet "Ladulås" to a decree of 1279 or 1280 freeing the yeomanry from the duty to provide sustenance for travelling nobles and bishops ("Peasants! Lock your barns!"); another theory is that it's simply a corruption of Ladislaus, which could possibly have been his second name, considering his
Slavic heritage.
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