The Congress of Vienna.
After the defeat of Napoleon Bonaparte, European leaders met at the Congress of Vienna to settle issues that would hopefully bring lasting accord to Europe. The goal was to restore a balance of power in the hopes that this would bring peace.
Congress of Vienna
The leaders of the Congress of Vienna were trying to restore the balance of power in Europe in a peaceful manner.
That was determined at the Congress of Vienna, but he played no part in it.
The Monarchy was returned to France after the French Empire under Napoleon was defeated at Waterloo as a result of the Congress of Vienna.
The Congress of Vienna.
Italy and Germany had basically always been divided since Charlemagne died, not counting loose groupings like the Holy Roman Empire; however, presumably you are asking about the Congress of Vienna in 1815. During his wars, Napoleon had tried to unify Germany and Italy as countries allied with him; after he was defeated for good, the countries who had defeated him, as well as France, met in Vienna and reaffirmed that Germany and Italy would remain divided, among other things.
Congress of Vienna
To redraw the map of Europe after the fall of Napoleon
Napoleon had been defeated at the battle of Waterloo by the English General Wellington and a German Army. The Congress of Vienna did not assure peace, it simply made it possible. Thousands of young men had been killed in Napoleon's wars. The countries of Europe wanted the senseless wars to end. They were tired of the bloodshed.
The Congress of Vienna.