The intrigue is reminiscent of the Congress of Vienna in 1815 that drew the post-Napoleonic map of Europe.

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He had written a highly regarded book about the Congress of Vienna.

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The reason why the Congress of Vienna is so notable is because so few other international gatherings have been successful in ensuring peace.

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Foreign secretary from 1812, he negotiated the Treaty of Paris and participated strongly at the Congress of Vienna following the end of Napoleon.

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The next major event is the Congress of Vienna in 1814, when the powers that defeated Napoleon Bonaparte put their own stamp on the system.

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As the envoy of a defeated power at the Congress of Vienna, he played a weak hand with determination and skill, securing France within its pre-revolutionary borders and achieving a part at least of his vision for Europe.

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Dr Johnson, who presented these findings this week at the European Respiratory Congress in Vienna, concludes that antibiotic use at the beginning of life is mucking up infants' immune systems, malfunctions of which manifest themselves in the form of asthma and allergies.

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