Magnus Birgersson (1300–1320)

Magnus Birgersson (September 1300 1 June 1320) was the eldest son of King Birger Magnusson of Sweden. He was hailed as the heir to the Swedish throne and became embroiled in the power struggles between his father and his uncles, dukes Erik and Valdemar, who had rebelled against King Birger.

In 1317, King Birger imprisoned his brothers, Erik and Valdemar, during the infamous Nyköping Banquet and had them killed in 1318. This led to a rebellion by their supporters. While Birger fled the country, Magnus was captured by his father's enemies. In 1319, King Birger was deposed and Magnus Eriksson, Magnus Birgersson's cousin, was elected King of Sweden. Magnus Birgersson was subsequently executed on Helgeandsholmen in Stockholm in 1320.