The Treaty of Westphalia marked the end of the Thirty Years' War in Europe and was signed in 1648. This series of treaties brought together various European powers and established a new political framework for international relations. It recognized the sovereignty of states and played a crucial role in limiting the influence of the Catholic Church in political matters. The treaties laid the foundation for the modern state system, emphasizing the principle of territorial sovereignty and non-interference in the internal affairs of other nations. The Treaty of Westphalia significantly influenced subsequent diplomatic practices and international law.