Polish–Swedish union

Polish–Swedish union
Svensk-polska unionen (Swedish)
Unia polsko-szwedzka (Polish)
Unione Poloniae Sueciae (Latin)
1592–1599
Motto: "Pro iure et populo"
"Cor regis in manu Domini"
"Coelitus sublima dantur"
Map of the Polish–Swedish union (dark green) with vassal states (light green) at its greatest territorial extent in 1596.
Common languagesLatin, Polish, Swedish
Religion
Roman Catholicism
GovernmentParliamentary elective monarchy
Monarch 
 1592–1599
Sigismund III Vasa
LegislatureGeneral Sejm
Senate
Chamber of Deputies
Historical eraEarly modern period
17 November 1592
18 May 1595
 Riksdag of 1595
30 September 1595
February 1598
24 July 1599
Preceded by
Succeeded by
Polish–Lithuanian Commonwealth
Kingdom of Sweden (1523–1611)
Polish–Lithuanian Commonwealth
Kingdom of Sweden (1523–1611)

The Polish–Swedish union was a short-lived personal union between the Polish–Lithuanian Commonwealth and the Kingdom of Sweden between 1592 and 1599. It began when Sigismund III Vasa, elected King of Poland and Grand Duke of Lithuania, was crowned King of Sweden following the death of his father John III. The union ended following a civil war in Sweden in which he lost the crown to his uncle, who eventually became Charles IX. Sigismund afterwards returned to Warsaw and pursued a war against his former realm.