20 July 1543 at Hörningsholm Castle, d. 24 May 1567 in the Sture Murders at Uppsala Castle) was a Swedish diplomat and soldier during the reign of Erik XIV of Sweden.
[1] He was the son of Svante Stensson Sture and Märta ("King Martha") Erikdotter Leijonhufvud.
[1] As a soldier, he participated in the Nordic Seven Years War's battles of Varberg and Axtorna, where he was wounded, and in the Siege of Bohus.
[2] On 15 June 1566, after a death sentence Sture had received was commuted, he was publicly humiliated in Stockholm, where he was forced to ride a wretched hack through town with a straw crown on his head.
[2] On 21 May 1567, returning from his final mission in Lorraine,[1] he was arrested again in Uppsala Castle.