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.
Holy Roman Emperor
The Holy Roman Emperor (also "German-Roman Emperor", "Roman-German emperor"; historically "", "Emperor of the Romans") was the ruler of the Holy Roman Empire (considered the successor of the Western Roman Empire) during the medieval and early modern periods. The title was, almost without interruption, held in conjunction with title of King of Germany ("rex teutonicorum") throughout the 12th to 18th centuries.