The person most responsible for the accomplishments of the congress of vienna was

The person most often credited with the major accomplishments of the Congress of Vienna is Klemens von Metternich, who was the Foreign Minister of the Austrian Empire at the time. Metternich played a central role during the Congress, which took place from September 1814 to June 1815, by shaping much of the discussions and decisions that aimed at establishing a long-lasting peace and balance of power in Europe after the turmoil caused by the Napoleonic Wars. His diplomacy, insistence on legitimizing monarchies and shaping a conservative order in Europe are considered integral to the outcomes of the Congress.

The Congress of Vienna was a conference of ambassadors from the major powers in Europe, held in Vienna from 1814 to 1815. The main objective was to provide a long-term peace plan for Europe by settling critical issues arising from the French Revolutionary Wars and the Napoleonic Wars. The goals were to resize the main powers so they could balance each other and remain at peace, restore old boundaries, and create a framework for European relations based on balance of power principles.

Prince Klemens Wenzel Nepomuk Lothar von Metternich was a conservative Austrian statesman who had a significant influence on European politics. He believed in a Europe based on a monarchical structure and sought to prevent the spread of revolutionary ideas. His approach to foreign policy was based on conservatism, stability, and the balance of power, which is the idea that no single power should be allowed to dominate the continent. The so-called 'Metternich System' he promulgated aimed at suppressing nationalistic and liberal revolts and maintaining the status quo.

Other key players at the Congress of Vienna included Tsar Alexander I of Russia, King Frederick William III of Prussia, and representatives from Great Britain, among others. The decisions made at the Congress led to nearly a century of relative peace in Europe, known as the 'Concert of Europe'. Despite the peace, the Congress did not address burgeoning nationalist and liberal sentiments effectively, leading eventually to clashes and conflicts in the later 19th century. Nevertheless, the Congress of Vienna is often cited as a successful example of international cooperation and diplomacy.