__NOTOC__ The treaty of Marienburg, concluded on 29 June 1656, was a

Brandenburg-Prussia Brandenburg-Prussia (german: Brandenburg-Preußen; ) is the historiographic denomination for the early modern realm of the Brandenburgian Hohenzollerns between 1618 and 1701. Based in the Electorate of Brandenburg, the main branch of the Hohe ...

n –

Swedish Swedish or ' may refer to: Anything from or related to Sweden, a country in Northern Europe. Or, specifically: * Swedish language, a North Germanic language spoken primarily in Sweden and Finland ** Swedish alphabet, the official alphabet used by ...

alliance during the

Second Northern War The Second Northern War (1655–60), (also First or Little Northern War) was fought between Sweden and its adversaries the Polish–Lithuanian Commonwealth (1655–60), the Tsardom of Russia ( 1656–58), Brandenburg-Prussia (1657–60), the ...

.Frost (2000), p. 173 In January 1656,

Charles X Gustav of Sweden Charles X Gustav, also Carl Gustav ( sv, Karl X Gustav; 8 November 1622 – 13 February 1660), was King of Sweden from 1654 until his death. He was the son of John Casimir, Count Palatine of Zweibrücken-Kleeburg and Catherine of Sweden. Afte ...

had made Frederick William I, Elector of Brandenburg, his vassal for the

Duchy of Prussia The Duchy of Prussia (german: Herzogtum Preußen, pl, Księstwo Pruskie, lt, Prūsijos kunigaikštystė) or Ducal Prussia (german: Herzogliches Preußen, link=no; pl, Prusy Książęce, link=no) was a duchy in the region of Prussia establish ...

. By the time of the treaty of Marienburg, Swedish prospect in the war had diminished, and Charles X Gustav was willing to offer Frederick William I a reward for fighting on his side. While the latter was to remain a Swedish vassal for Prussia, he was promised hereditary sovereignty in four voivodeships of

Greater Poland Greater Poland, often known by its Polish name Wielkopolska (; german: Großpolen, sv, Storpolen, la, Polonia Maior), is a historical region of west-central Poland. Its chief and largest city is Poznań followed by Kalisz, the oldest cit ...

in return for participating in the Charles X Gustav's Polish campaigns. This alliance proved victorious in the subsequent Battle of Warsaw, but as further campaigns stalled, Frederick William I was to gain full sovereignty in Prussia by the

Treaty of Labiau The Treaty of Labiau was a treaty signed between Frederick William I, Elector of Brandenburg and Charles X Gustav of Sweden on 10 November ( O.S.) / 20 November ( N.S.) 1656 in Labiau (now Polessk). With several concessions, the most important be ...

in November 1656.Frost (2000), p. 178

Sources

References

Bibliography

*Erdmannsdörffer, Bernhard: Friedrich Wilhelm (Kurfürst von Brandenburg), in:

Allgemeine Deutsche Biographie ''Allgemeine Deutsche Biographie'' (ADB, german: Universal German Biography) is one of the most important and comprehensive biographical reference works in the German language. It was published by the Historical Commission of the Bavarian Ac ...

, published by Historische Kommission bei der Bayerischen Akademie der Wissenschaften, Band 7 (1878), pp. 480–497
fulltext at de.wikisource
*

External links

{{Second Northern War treaties Second Northern War 1656 treaties Treaties of the Swedish Empire Marienburg 17th-century military alliances Military alliances involving Sweden 1656 in Europe 1656 in Sweden