Concert of Europe

The Concert of Europe was a group of countries in Europe who worked together and agreed on policies to maintain a steady balance of power which included alliances between the great powers in 1814 and 1914. The member countries were the United Kingdom, Austria, Russia, France (from 1815), Prussia (Germany from 1871) and Italy (from 1871). 
It started as a quadruple alliance. After Napoleon, ruler of France, was no longer in power, France joined the Concert of Europe. Its importance diminished with the revolutions of 1848 and subsequent wars between the big powers. Otto von Bismarck re-established the Concert of Europe after the unifications of Germany and Italy. The Concert definitively collapsed with World War I.
Leaders.
The leaders of this concert include:
The Concert was also known as the Congress System, where leaders would meet and reach decisions by mutual agreement. 
Goals.
Important goals of the Concert: 
Benefits: 
Decline: