Which document formally ended the Thirty Years' War?

The Peace of Westphalia is the document that officially concluded the Thirty Years' War, which lasted from 1618 to 1648. This collection of treaties, signed in 1648, marked a significant turning point in European history, establishing a new framework for national sovereignty and diplomatic relations. It resolved conflicts that involved multiple European powers and ended the religious wars between Protestants and Catholics, primarily in the Holy Roman Empire.

The treaties established principles of state sovereignty, where each state had the right to govern its own territory without external interference, thereby laying the groundwork for the modern state system. The Peace of Westphalia is often seen as a milestone in the development of international law and relations, making it a pivotal event in the history of Europe.

The other documents mentioned, such as the Magna Carta, Treaty of Utrecht, and Treaty of Paris, are significant in their own respects but relate to different historical contexts and conflicts, not the Thirty Years' War.