By: HISTORY.com Editors

1648

Thirty Years’ War ends

Published: July 20, 2010Last Updated: February 18, 2025

The Treaty of Westphalia is signed, ending the Thirty Years' War and radically shifting the balance of power in Europe.

The Thirty Years' War, a series of wars fought by European nations for various reasons, ignited in 1618 over an attempt by the king of Bohemia (the future Holy Roman emperor Ferdinand II) to impose Catholicism throughout his domains. Protestant nobles rebelled, and by the 1630s most of continental Europe was at war.

As a result of the Treaty of Westphalia, the Netherlands gained independence from Spain, Sweden gained control of the Baltic and France was acknowledged as the preeminent Western power. The power of the Holy Roman Emperor was broken and the German states were again able to determine the religion of their lands.

The principle of state sovereignty emerged as a result of the Treaty of Westphalia and serves as the basis for the modern system of nation-states.

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Citation Information

Article Title
Thirty Years’ War ends
Website Name
History
Date Accessed
March 27, 2026
Publisher
A&E Television Networks
Last Updated
February 18, 2025
Original Published Date
July 20, 2010