What imprtant ideas did metternich bring to the comgress of vienna?

At the Congress of Vienna in 1814-1815, Klemens von Metternich emphasized the principles of legitimacy, balance of power, and collective security. He advocated for the restoration of monarchies over revolutionary governments to ensure stability in Europe. Metternich believed that maintaining a balance of power among the great nations would prevent future conflicts and promote peace. His ideas significantly shaped the political landscape of Europe for decades, fostering a conservative order aimed at suppressing nationalist and liberal movements.