The Congress of Vienna (1814-1815) fundamentally restructured European territorial and political order following Napoleon's defeat, establishing a conservative balance of power designed to prevent future revolutionary upheavals and French hegemonic ambitions.

The victorious powers, Britain, Austria, Prussia, and Russia, created a new European balance through territorial redistribution and political cooperation. The Concert of Europe emerged as a diplomatic system for managing international crises and maintaining the Vienna settlement through regular conferences and collective intervention against revolutionary movements.

Austria gained Lombardy-Venetia in Italy and retained Galicia, while losing the Austrian Netherlands to the new Kingdom of the Netherlands. Prussia acquired the Rhineland, Westphalia, and parts of Saxony, significantly increasing its population and industrial potential. Russia retained Finland and most of Poland through the Congress Kingdom arrangement. France returned to its 1792 boundaries after briefly losing border territories.

The Holy Roman Empire was replaced by the German Confederation of 39 states, dominated by Austria and Prussia. This loose confederation maintained German fragmentation while providing collective security, though it created tension between Austrian and Prussian leadership ambitions.

Italy remained fragmented among Austrian territories, the Papal States, and various restored monarchies. The Ottoman Empire, though not participating in Vienna, faced increasing pressure from Russian expansion in the Balkans and Greek independence movements.

The Holy Alliance (Austria, Prussia, Russia) and later the Congress System created mechanisms for suppressing liberal and nationalist movements. These arrangements prioritized legitimacy and stability over national self-determination, establishing the principle of collective intervention against revolutionary change.

Britain's naval supremacy and colonial expansion were confirmed, while its continental commitment remained limited to preventing any single power from dominating Europe, establishing the foundation for 19th-century British foreign policy.