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When was the Final Act of the Congress of Vienna signed?

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Watercolor etching by August Friedrich Andreas Campe showing diplomats and military officers in ornate uniforms gathered around a large table with maps at the Congress of Vienna. — Congress of Vienna *The Congress of Vienna*, watercolor etching by August Friedrich Andreas Campe; in the collection of the State Borodino War and History Museum, Moscow.

The Final Act of the Congress of Vienna was signed on June 9, 1815. This comprehensive document consolidated the various agreements reached by the participating powers to reorganize Europe following the Napoleonic Wars.1