Final answer:
The true purpose of the Congress of Vienna was to establish a balance of power in Europe after the Napoleonic Wars and restore peace and stability. The goal was to re-establish conservative, sovereign governments that had existed before the French Revolution and Napoleonic era.
Step-by-step explanation:
The true purpose of the Congress of Vienna, according to Gentz, was to establish a balance of power in Europe after the Napoleonic Wars. The Congress aimed to prevent one nation from dominating others and to restore peace and stability among the European powers. The goal was to re-establish the conservative, sovereign governments that had existed before the French Revolution and Napoleonic era.