Siege of Turku Castle

Siege of Turku Castle
Part of the War against Sigismund

Duke Karl Insulting the Corpse of Klas Fleming by Albert Edelfelt, 1878
Date11–30 September 1597
Location
Åbo (modern-day Turku), Finland
60°27′6″N 22°16′1″E / 60.45167°N 22.26694°E / 60.45167; 22.26694
Result Swedish victory
Territorial
changes
Turku Castle is conquered by Duke Charles' forces
Belligerents
Sweden Polish–Swedish union
Commanders and leaders
Duke Charles
Hans Hansson
Ebba Stenbock 
Bengt Severinsson 
Hans Eriksson 
Arvid Stålarm
Strength
12 fähnleins of infantry
500 cavalry
Several ships
>1,000 men
Casualties and losses
260 killed
Some ships damaged
c. 200 killed

The Siege of Turku Castle (Swedish: belägringen av Åbo slott; Finnish: Turun linnan piiritys) occurred from 11 to 30 September 1597 during the early stages of the War against Sigismund.

After gaining full control of the Swedish government along with Kalmar and Älvsborg, Duke Charles went on an expedition to Finland. He arrived at Åbo with a fleet in late August, landing his troops at Ruskiakallio on 7 September where he repelled a force under the command of Arvid Stålarm.

After engaging in failed negotiations and a skirmish at Kuppiskällan on 9 September, Duke Charles formally besieged Åbo on 11 September. As the garrison began to splinter, negotiations began on 29 September, with the garrison capitulating one day later.

According to legend, Duke Charles was led into the castle's church, where he pulled on the beard of the late Klas Fleming, saying that if Fleming was not dead, his head would have been decapitated, with his widow, Ebba Stenbock, replying, "If my blessed lord had lived, His Grace would never have come in here". However, the story was most likely made up.