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Treaty of Königsberg (1656)

Treaty of Königsberg
Type Legal status of the Duchy of Prussia
Signed 17 January 1656
Location Königsberg castle (now Kaliningrad)
Signatories Charles X Gustav of Sweden
Frederick William I of Brandenburg
Parties Swedish Empire
House of Hohenzollern
Language Latin

The Treaty of Königsberg was concluded on 7 January (O.S.) / 17 January (N.S.) 1656 during the Second Northern War.[1] Frederick William I, the "Great Elector" of Brandenburg and duke of Prussia, was forced to join the Swedish camp and became a Swedish vassal for the Duchy of Prussia and Ermland (Ermeland, Warmia).[2] In a second treaty, negotiated on 24 February 1656 in Königsberg (Królewiec), Frederick William I concluded a defensive alliance with France.[3]


  • Background 1
  • Treaty between Brandenburg-Prussia and Sweden 2
  • Treaty between Brandenburg-Prussia and France 3
  • Consequences 4
  • See also 5
  • Sources 6
    • References 6.1
    • Bibliography 6.2
  • External links 7


In 1655, the rapid progress of the Swedish campaign in Poland-Lithuania made Brandenburgian elector Frederick William I worried about his Duchy of Prussia,[4] which he held as a Polish fief.[2] Frederick William I, who maintained an army of 14,000 men in Brandenburg,[1] marched his army to Prussia[4] and in the Treaty of Rinsk of 12 November concluded a defensive alliance with the Royal Prussian nobility, who maintained an army consisting of 600 troops raised by the Prussian estates and a levy of 3,000 to 4,000 men.[1] In addition, 3,600 troops of the regular army and mercenaries were stationed in Royal Prussia.[1]


Duchy of Prussia and Ermland (Warmia) as Swedish fiefs

Treaty between Brandenburg-Prussia and Sweden

Frederick William I took the Duchy of Prussia as a fief from Charles X Gustav, and had to provide him with troops.[2] Without Swedish permission, the Electorate of Brandenburg would not maintain a navy in the Baltic Sea.[2] In return, Frederick William I received Ermland.[2]

In article XVII, the Lutheran Swedish king further obliged the Calvinist elector to grant religious freedom to the Lutherans in Prussia.[7]

Treaty between Brandenburg-Prussia and France

The Franco-Prussian treaty included a defensive alliance between the parties.[3] Drafted on 24 February, it was ratified on 12 April by Louis in Paris and on 24 October by Frederick William in Königsberg.[3]


The treaty of Königsberg was followed by the Treaty of Marienburg on 25 June, when the tide of the war had turned against Sweden and Brandenburg-Prussia advanced to the position of a Swedish ally.[8]

Still a vassal of Charles X Gustav for Prussia,[2] Frederick William I entered the war and the combined Swedish-Brandenburgian forces defeated the Polish army in the Battle of Warsaw in July.[9] This made the Polish king John II Casimir Vasa, from whom Frederick William I had to take Prussia as a fief prior to Königsberg, say that once the Tartars had the Swedes for breakfeast, he would arrest the elector "where neither sun nor moon will shine".[2] In August, John II Casimir had Wincenty Korwin Gosiewski invade Prussia to "punish Frederick William for his treachery".[10] Thirteen towns and 250 villages were burned until Gosiewski was expelled in October, and the campaign was terrifying enough to persist in local folklore until the 20th century.[11]

Hard-pressed himself by several countries entering the war against him, Charles X Gustav in January 1656 agreed with Frederick William I on the Treaty of Labiau, which altered the terms of Königsberg in a way that the Hohenzollern electors were freed of Swedish vassalage for the Prussian duchy at the cost of Ermland and a more active participation in the war.[12] In the subsequent treaties of Wehlau and Bromberg, John II Casimir confirmed Frederick William I's sovereignty in Prussia after the latter abandoned Sweden in the war.[13]

See also



  1. ^ a b c d e f g Frost (2000), p. 171
  2. ^ a b c d e f g Press (1991), p. 402
  3. ^ a b c von Moerner (1965), p. 201
  4. ^ a b c d e Press (1991), p. 401
  5. ^ Frost (2000), p. 172
  6. ^ Press (1991), pp. 401-402
  7. ^ Evans (1997), p. 54
  8. ^ Frost (2000), p. 173
  9. ^ Frost (2000), pp. 173-174
  10. ^ Frost (2000), p. 177
  11. ^ Frost (2000), p. 178
  12. ^ Press (1991), pp. 402-403
  13. ^ Press (1991), p. 403


  • Evans, Malcolm (1997). Religious liberty and international law in Europe. Cambridge studies in international and comparative law 6. Cambridge University Press.  
  • Frost, Robert I (2000). The Northern Wars. War, State and Society in Northeastern Europe 1558-1721. Harlow: Longman.  
  • von Moerner, Theodor, ed. (1965). Königlich Geheimes Staatsarchiv. Kurbrandenburgs Staatsverträge von 1601-1700 (in German). de Gruyter. 
  • Press, Volker (1991). Kriege und Krisen. Deutschland 1600-1715. Neue deutsche Geschichte (in German) 5. Munich: Beck.  

External links

  • Scan of the treaty of Königsberg (Brandenburg-Prussia and Sweden) at (Institut für Europäische Geschichte Mainz), 32 pages
  • Scan of the treaty of Königsberg (Brandenburg-Prussia and France) at (French Ministry for Foreign Affairs), 31 pages, pdf
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