What were some of the major challenges to the settlement reached as the congress of vienna? most important 1's

Answer 1

I would have to say the most important one would have to be the division of territory after the Napoleonic Wars. Lots of countries ceded territory to other countries. Also, there were some restorations of thrones to some the countries conquered by Napoleon. So, I am sure there were a few that balked at this idea.

Answer 2

In conclusion, the Congress and Settlement of Vienna managed to control and discourage war between the Great Powers in Europe for much of the 19th Century. They also managed to restore the balance of power to effectively build a peaceful Europe which was as it had been before Napoleon, as was their intention. Their refusal to acknowledge that times were changing and that there were new forces to be reckoned with and respected, they failed to build a very stable and pleasant Europe. The Great Powers might not have been aware of the potency of such forces as Nationalism or Liberalism, or they, as Metternich, thought that any attempt compromise with them would only strengthen those forces and lead to nothing but ruin. In the end, however, I would see this as about as good as one can expect with leaders from the ‘old age’ trying to solve problems of a ‘new age’ the old way. When comparing the Settlement of Vienna and its aftermath to the Treaty of Versailles and its aftermath, it becomes clear which one solved the problems that mattered.
http://www.allempires.com/article/index.php?q=congress_of_vienna
Although the territorial changes brought about by the Congress of Vienna did not endure long in entirety, they represented a practical if not always equitable solution and an attempt at dealing with Europe as an organic whole. The Quadruple Alliance and the Holy Alliance, designed to uphold the decisions of Vienna and to settle disputes and problems by means of conferences, were an important step toward European cooperation. The Concert of Europe, which functioned—even though imperfectly—through the 19th cent., may be credited to the Congress of Vienna. 10
An auxiliary accomplishment of the Congress was the adoption of standard rules of diplomacy. Serious defects, however, included the disregard of the growing national aspirations and the social changes that brought about the revolutions of 1848, and the failure to include the Ottoman Empire in the settlement and to deal satisfactorily with the Eastern Question
http://www.bartleby.com/65/vi/Vienna-C.html
Conclusion - By the standard of problem-solving, the Congress of Vienna and its achievements had found good solutions to the three problems that it had to solve. Firstly, it had taken measures to prevent future French) aggression. These included the strengthening of French neighbours such as Prussia, the Netherlands and Piedmont, the weakening of France through the second Treaty of Paris, as well as the signing of the Quadruple Alliance.

Secondly, the conflicting interests of the rival powers were largely accommodated. Each of the Big Four got their share of territories and the explosive Polish-Saxon issue was compromised.

Thirdly, the great powers had successfully restored a ‘balance of power' in Europe through territorial rearrange­ments and restoration of legitimate rulers. Moreover, they agreed to a ‘Congress System' to discuss matters of common interest. These moves did much to give Europe a long period of peace after 1815.
http://www.thecorner.org/hist/essays/europe/Vienna-settlement.htm