Peace of Prague (1635)

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Peace of Prague
Pražský mír (cs)
Prager Frieden (de)
Prague Castle
Signed 30 May 1635
Location Prague Castle, Bohemia
Signatories Banner of the Holy Roman Emperor with haloes (1400-1806).svg Holy Roman Emperor
Flag of Electoral Saxony.svg Electorate of Saxony

The Peace of Prague of 30 May 1635 was a treaty between the Habsburg Emperor Ferdinand II and the Electorate of Saxony representing most of the Protestant states of the Holy Roman Empire. It effectively brought to an end the civil war aspect of the Thirty Years' War; however, the combat actions still carried on due to the continued intervention on German soil by Spain, Sweden, and, from mid-1635, France, until the Peace of Westphalia was concluded in 1648.


Negotiations towards the agreement had been instigated by the Elector John George I of Saxony, who whilst being a Lutheran prince had nonetheless initially supported the Emperor against the revolting Bohemian estates and had remained neutral during the Swedish intervention in 1630. However, after continued plundering of the Saxon lands by the troops of the Catholic League, he had joined the forces of King Gustavus Adolphus at the 1631 Battle of Breitenfeld. Gustavus Adolphus' death at the Battle of Lützen in 1632 and the Protestant defeat at the 1634 Battle of Nördlingen prompted the elector to again switch sides.

Years of fighting, an inability to reimpose the Catholic confession by force, the assassination of Generalissimo Albrecht von Wallenstein, and the need to put an end to the intervention of foreign powers in German affairs all combined to bring Ferdinand II to the table with a degree of willingness to make concessions towards the Lutheran estates.


The main terms of the treaty were:

  • The Edict of Restitution of 1629 was effectively revoked, with the terms of the Peace of Augsburg of 1555 being re-established as at 12 November 1627. However, according to the Reservatum ecclesiasticum Protestant administrators of Prince-Bishoprics and Imperial abbeys still gained neither seat nor vote in the Imperial Diet. Ferdinand II continued to push the Counter-Reformation in the lands of the Habsburg Monarchy.
  • Formal alliances of States of the Empire among themselves or with foreign powers were prohibited, which applied to both the Catholic League and the Protestant Heilbronn League.
  • The armies of the various states were to be unified under the command of the Princes as generals of the Emperor, to establish an Imperial Army for the Holy Roman Empire as a whole, which would fight against invading troops.
  • Amnesty was granted to those princes who had fought against Imperial troops, with the exception of the exiled descendants of the former "Winter King", Elector Palatine Frederick V.

As well as bringing to an end the fighting between the various states, the treaty also brought to an end religion as a source of national conflict; the principle of cuius regio, eius religio was established for good within the Empire. In return for making concessions in this area, Ferdinand II gained the alliance of the Lutheran princes both in the struggle against the Swedish intervention, and against the expected intervention of France. However, the intended restoration of the Imperial authority ultimatively failed as Emperor Ferdinand III had to acquiesce in a much larger enfeeblement to reach a final peace in 1648.

Saxony with Lower and Upper Lusatia, 1648

Territorial changes

Ferdinand was also forced to make individual concessions to some of the major states to get them to sign the treaty: Saxony was granted the Bohemian crown lands of Lower and Upper Lusatia by Ferdinand II in his capacity as King of Bohemia. The Margraviate of Brandenburg, since 1618 part of the personal union of Brandenburg-Prussia, had its claim to the Farther Pomeranian possessions of the last Duke Bogislaw XIV confirmed. Even the Catholic Electorate of Bavaria, which had supported the Emperor throughout the war, extracted some minor concessions.

See also

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