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From Wikipedia, the free encyclopedia
Magnus Birgersson (c. 1300 – 1320)[1] was a Swedish royal prince, the eldest son of King Birger Magnusson of Sweden and Queen Märta Eriksdotter of Denmark. He was designated heir apparent but never became king.[2]
Life and position
Magnus was born around 1300 into the House of Bjälbo. His father, King Birger, was engaged in a prolonged power struggle with his younger brothers, Dukes Erik Magnusson and Valdemar Magnusson, over control of the Swedish kingdom.[1] According to the medieval chronicle Erikskrönikan, Magnus was publicly recognized as the future king while still a child, although the exact details and date of this ceremony remain uncertain.institutional source)[3]
Civil war and downfall
In 1306, during the event known as the Håtuna game, Dukes Erik and Valdemar captured King Birger and his family. Magnus’s role is not clearly described in surviving sources.[1] In 1317, at the Nyköping Banquet, King Birger imprisoned his brothers, who later died in captivity in 1318; the incident triggered a nationwide rebellion, and Birger was deposed in 1319.[2] Magnus was subsequently captured by his father’s opponents and executed in 1320 on Helgeandsholmen in Stockholm.[2] While the precise execution site is not identified in contemporary administrative records, Helgeandsholmen is first explicitly attested in written sources in 1320, and later tradition associates Magnus’s death with the islet.[4]