Which treaty was signed to officially end the Thirty Years War?

The Treaty of Westphalia is recognized as the agreement that officially ended the Thirty Years War, which occurred from 1618 to 1648 in Europe. This conflict involved a complex mix of religious disputes, political power struggles, and territorial ambitions across the continent, primarily affecting the Holy Roman Empire. The treaty was significant not only for bringing an end to the war but also for laying the groundwork for a new order in international relations, emphasizing the principles of state sovereignty and non-interference in the affairs of other states.

The Treaty of Westphalia is often credited with establishing the concept of the modern nation-state, having delineated newly recognized borders and granting rulers greater autonomy over their domestic affairs. Its legacy continues to influence international law and diplomacy today.

The other treaties mentioned, such as the Treaty of Versailles, the Treaty of Utrecht, and the Treaty of Paris, relate to different historical contexts and conflicts, including World War I and various colonial disputes, but they are not related to the Thirty Years War. Therefore, the correct choice is the Treaty of Westphalia due to its crucial role in concluding this specific European conflict and shaping the future of international relations.