Emperor of Austria in the context of "Francis II, Holy Roman Emperor"

Austria-Hungary, also referred to as the Austro-Hungarian Empire or the Dual Monarchy, was a multi-national constitutional monarchy in Central Europe between 1867 and 1918. A military and diplomatic alliance, it consisted of two sovereign states with a single monarch who was titled both the Emperor of Austria and the King of Hungary. Austria-Hungary constituted the last phase in the constitutional evolution of the Habsburg monarchy: it was formed with the Austro-Hungarian Compromise of 1867 in the aftermath of the Austro-Prussian War, following wars of independence by Hungary (primarily Rákóczi's War of Independence of 1703–1711 and the Hungarian Revolution of 1848–1849) in opposition to Habsburg rule. It was dissolved shortly after Hungary terminated the union with Austria in 1918 at the end of World War I.

Austria-Hungary was one of Europe's major powers, and was the second-largest country in Europe in area (after Russia) and the third-most populous (after Russia and the German Empire), while being among the 10 most populous countries worldwide. The Empire built up the fourth-largest machine-building industry in the world. With the exception of the territory of the Bosnian Condominium, the Empire of Austria and the Kingdom of Hungary were separate sovereign countries in international law.

Franz Joseph I or Francis Joseph I (German: Franz Joseph Karl [fʁants ˈjoːzɛf ˈkaʁl]; Hungarian: Ferenc József Károly [ˈfɛrɛnt͡s ˈjoːʒɛf ˈkaːroj]; 18 August 1830 – 21 November 1916) was Emperor of Austria, King of Hungary, and the ruler of the other states of the Habsburg monarchy from 2 December 1848 until his death in 1916. In the early part of his reign, his realms and territories were referred to as the Austrian Empire, but in 1867 they were reconstituted as the dual monarchy of Austria-Hungary. From 1 May 1850 to 24 August 1866, he was also president of the German Confederation.

In December 1848, Franz Joseph's uncle Emperor Ferdinand I abdicated the throne at Olomouc, as part of Minister President Felix zu Schwarzenberg's plan to end the Hungarian Revolution of 1848. Franz Joseph then acceded to the throne. In 1854, he married his first cousin Duchess Elisabeth in Bavaria, with whom he had four children: Sophie, Gisela, Rudolf, and Marie Valerie. Largely considered to be a reactionary, Franz Joseph spent his early reign resisting constitutionalism in his domains. The Austrian Empire was forced to cede its influence over Tuscany and most of its claim to Lombardy–Venetia to the Kingdom of Sardinia, following the Second Italian War of Independence in 1859 and the Third Italian War of Independence in 1866. Although Franz Joseph ceded no territory to the Kingdom of Prussia after the Austrian defeat in the Austro-Prussian War, the Peace of Prague (23 August 1866) settled the German Question in favour of Prussia, which prevented the unification of Germany from occurring under the House of Habsburg.

The Triune Kingdom (Croatian: Trojedna kraljevina) or Triune Kingdom of Croatia, Slavonia and Dalmatia (Croatian: Trojedna Kraljevina Hrvatske, Slavonije i Dalmacije) was the concept—advocated by the leaders of the 19th-century Croatian national revival—of a united kingdom between Croatia, Slavonia and Dalmatia, which were already within the Austrian Empire under one king, who was also the Emperor of Austria, but were politically and administratively separate entities. This concept had roots in the high medieval period, as a successor to the historical Kingdom of Croatia which was made up of those regions.

After 1867, Croatia and Slavonia were within the Hungarian half of Austria-Hungary and were united in 1868 as the Kingdom of Croatia-Slavonia, where the name Triune Kingdom of Croatia, Slavonia and Dalmatia became official. However, Dalmatia, being located in the Austrian half, still remained de facto separate. Until the end of the Austro-Hungarian Empire, several Croatian political parties and groups sought recognition of the Triune Kingdom and the incorporation of Dalmatia into Croatia-Slavonia. The Croatian intelligentsia, especially lawyers and historians, played a key role in interpreting historical sources so as to legitimize the demand for the Triune Kingdom.

Southern Schleswig (German: Südschleswig or Landesteil Schleswig, Danish: Sydslesvig; North Frisian: Söödslaswik) is the southern half of the former Duchy of Schleswig in Germany on the Jutland Peninsula. The geographical area today covers the large area between the Eider river in the south and the Flensburg Fjord in the north, where it borders Denmark. Northern Schleswig, congruent with the former South Jutland County, forms the southernmost part of Denmark. The area belonged to the Crown of Denmark until Prussia and Austria declared war on Denmark in 1864. Denmark wanted to give away the German-speaking Holsten and set the new border at the small river Ejderen. Prussian chancellor Otto von Bismarck concluded that this justified a war, and even proclaimed it a "holy war". He also turned to the Emperor of Austria, Franz Joseph I of Austria for help. A similar war in 1848 had gone poorly for the Prussians. With Prussia's modern weapons and the help from both the Austrians and General Moltke, the Danish army was destroyed and forced to make a disorderly retreat. The Prussian-Danish border was then moved from the Elbe up in Jutland to the Kongeåen creek.

After the First World War, two referendums decided a new border.The northern part reverted to Denmark as Nordslesvig (North Slesvig). But the middle and southern part, including Schleswig's only city, Flensburg, remained in Germany. In Denmark, the loss of Flensborg sparked a political crisis, Påskekrisen or the Easter Crisis of 1920. After the Second World War the area remained as German territory and, with Holstein, formed the new state of Schleswig-Holstein as a part of the Federal Republic of Germany (West Germany) in 1948.

Ferdinand I (German: Ferdinand I. 19 April 1793 – 29 June 1875) was Emperor of Austria from March 1835 until his abdication in December 1848. He was also King of Hungary, Croatia and Bohemia (as Ferdinand V), King of Lombardy–Venetia and holder of other lesser titles (see grand title of the Emperor of Austria). Due to his passive but well-intentioned character, he gained the sobriquet The Benign (German: Der Gütige) or The Benevolent (Czech: Ferdinand Dobrotivý, Polish: Ferdynand Dobrotliwy).

Ferdinand succeeded his father Francis I upon his death on 2 March 1835. He was incapable of ruling the empire because of severe epilepsy, so his father, before he died, made a will promulgating that Ferdinand should consult his uncle Archduke Louis on all aspects of internal policy and urged him to be influenced by Prince Metternich, Austria's Foreign Minister.

Marie Louise (Maria Ludovica Leopoldina Franziska Theresia Josepha Lucia; 12 December 1791 – 17 December 1847) was Duchess of Parma from 11 April 1814 until her death in 1847. She was Napoleon's second wife and as such Empress of the French and Queen of Italy from their marriage on 2 April 1810 until his abdication on 6 April 1814.

As the eldest child of Francis II, Holy Roman Emperor and Emperor of Austria, and his second wife, Maria Theresa of Naples and Sicily, Marie Louise grew up during a period marked by ongoing and unceasing conflict between Austria and revolutionary France. A series of military defeats at the hands of Napoleon Bonaparte had inflicted a heavy human toll on Austria and led Francis to dissolve the Holy Roman Empire. The end of the War of the Fifth Coalition resulted in the marriage of Napoleon and Marie Louise in 1810, which ushered in a brief period of peace and friendship between Austria and the French Empire, much like prior alliances between the Austrian and French Royal family. Marie Louise agreed to the marriage despite being raised to despise France. She bore Napoleon a son, styled the King of Rome at birth, who briefly succeeded him as Napoleon II. Marie Louise's son was later titled Duke of Reichstadt.