CEVAP:

Even though every European state appeared at the Congress of Vienna, final decisions ultimately were made by the four major powers: Austria, Britain, Prussia, and Russia. They focused particularly on territorial rearrangements in Europe. To ease their security concerns, they abolished new political units created by Napoleon.
They also wanted to prevent any future revolution in Europe inspired by the French revolution. Therefore, ancient régimes (former monarchical regimes) were restored in France, Spain, and the Netherlands. As such the Congress of Vienna marked a return to a Europe composed of monarchies (Kissinger, 1957: 176).