Holy Roman Empire
The empire was dissolved on 6 August 1806, when the last Holy Roman Emperor Francis II (from 1804, Emperor Francis I of Austria) abdicated, following a military defeat by the French under Napoleon at Austerlitz (see Treaty of Pressburg). Napoleon reorganized much of the Empire into the Confederation of the Rhine, a French satellite. Francis' House of Habsburg-Lorraine survived the demise of the empire, continuing to reign as Emperors of Austria and Kings of Hungary until the Habsburg empire's final dissolution in 1918 in the aftermath of World War I.
Francis II, Holy Roman Emperor
In 1813, for the fourth and final time, Austria turned against France and joined Great Britain, Russia, Prussia and Sweden in their war against Napoleon. Austria played a major role in the final defeat of France—in recognition of this, Francis, represented by Clemens von Metternich, presided over the Congress of Vienna, helping to form the Concert of Europe and the Holy Alliance, ushering in an era of conservatism in Europe. The German Confederation, a loose association of Central European states was created by the Congress of Vienna in 1815 to organize the surviving states of the Holy Roman Empire. The Congress was a personal triumph for Francis, who hosted the assorted dignitaries in comfort, though Francis undermined his allies Tsar Alexander and Frederick William III of Prussia by negotiating a secret treaty with the restored French king Louis XVIII.