WORLD HISTORY

Detailed explanation-1: -12, 1822, London), British foreign secretary (1812–22), who helped guide the Grand Alliance against Napoleon and was a major participant in the Congress of Vienna, which redrew the map of Europe in 1815. Castlereagh was one of the most distinguished foreign secretaries in British history.

Detailed explanation-2: -As the Congress’s sessions were in Vienna, Emperor Francis was kept closely informed. The United Kingdom was represented first by its Foreign Secretary, Viscount Castlereagh; then by the Duke of Wellington, after Castlereagh’s return to England in February 1815.

Detailed explanation-3: -The leaders of the Congress of Vienna were British Foreign Minister Robert Steward, Lord Castlereagh, Tsar Alexander I of Russia, and Austrian Chancellor Klemens von Metternich. Two other major players were French Foreign Minister Charles Maurice de Talleyrand and Prussian Prince Karl August von Hardenberg.

Detailed explanation-4: -Robert Stewart, 2nd Marquess of Londonderry, KG, GCH, PC, PC (Ire) (18 June 1769 – 12 August 1822), usually known as Lord Castlereagh, derived from the courtesy title Viscount Castlereagh (UK: /ˈkɑːsəlreɪ/ KAH-səl-ray) by which he was styled from 1796 to 1821, was an Anglo-Irish politician and statesman.

Detailed explanation-5: -The Congress was hosted by the Austrian Chancellor Duke Metternich. The delegates drew up the Treaty of Vienna of 1815 with the object of undoing most of the changes that had come about in Europe during the Napoleonic wars.