The Congress system refers to a series of international conferences held in Europe between 1814 and 1822, following the end of the Napoleonic Wars. These conferences aimed to establish a new balance of power and restore stability in Europe after years of conflict.

The most significant of these conferences was the Congress of Vienna in 1814-1815, which was attended by representatives from major European powers. The Congress of Vienna aimed to reshape the map of Europe, redrawing borders and establishing a new political order. The Congress system was based on the idea of collective security and cooperation among European powers to prevent any one country from becoming too powerful and disrupting the balance of power.

The Congress system also led to the establishment of the Concert of Europe, an informal alliance among major European powers to maintain peace and stability. Regular diplomatic meetings and negotiations were held among the powers to address issues and conflicts that arose.

The Congress system and the Concert of Europe played a significant role in maintaining peace in Europe for several decades after the Napoleonic Wars. However, with the rise of nationalism and the changing dynamics of power in the 19th century, the system eventually began to lose its effectiveness.

Overall, the Congress system was a diplomatic framework that aimed to establish and maintain peace in Europe after the Napoleonic Wars through collective security and cooperation among major powers.