The primary outcome of the Congress of Vienna in 1815 was the restoration of stability and order in Europe following the upheaval caused by the Napoleonic Wars. The congress aimed to redraw the map of Europe and establish a balance of power that would prevent future conflicts. Key decisions included the reinstatement of monarchies in France and other parts of Europe, the rearrangement of territorial boundaries, and the establishment of the Concert of Europe system, which sought to promote diplomatic collaboration among the major powers. The Congress of Vienna laid the groundwork for a century of relative peace in Europe, known as the “Concert Era,” until World War I.