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Defenestration of Prague and the outbreak of the Thirty Years' War

23 May 1618·Military & conflict·Bohemia and the Holy Roman Empire (Prague)·
23 May 1618Date
Military & conflictCategory
30Empires active
Date
23 May 1618
Category
Military & conflict
Region
Bohemia and the Holy Roman Empire (Prague)
Era
Early Modern
Significance

On 23 May 1618 Bohemian Protestant nobles threw two Catholic imperial regents and their secretary from a window of Prague Castle, an act of defiance against the Habsburg crown that triggered the Bohemian Revolt and ignited the Thirty Years' War.

The crisis grew from Catholic infringements of the religious liberties guaranteed by Emperor Rudolf II's Letter of Majesty (1609) and from the prospect that the staunchly Catholic Ferdinand II would extinguish Protestant rights once he became king of Bohemia. The Bohemian estates rose in revolt, electing the Calvinist Frederick V of the Palatinate as their king. What began as a regional confessional and constitutional dispute escalated, through shifting alliances, into a general European war drawing in the Holy Roman Empire's princes, Spain, Denmark, Sweden and ultimately France. Fought largely on German soil over thirty years, it became one of the most destructive conflicts in European history, devastating populations through battle, famine and plague. The defenestration thus marks a pivotal hinge of the early-modern era, where religious antagonism, dynastic ambition and the struggle over imperial authority converged into catastrophe.

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