Charles I of AustriaCharles I or Karl I (Karl Franz Josef Ludwig Hubert Georg Otto Maria, Károly Ferenc József Lajos Hubert György Ottó Mária; 17 August 1887 1 April 1922) was Emperor of Austria, King of Hungary (as Charles IV, IV. Károly), King of Croatia, King of Bohemia (as Charles III, Karel III.), and the last of the monarchs belonging to the House of Habsburg-Lorraine to rule over Austria-Hungary. The son of Archduke Otto of Austria and Princess Maria Josepha of Saxony, Charles became heir presumptive of Emperor Franz Joseph when his uncle Archduke Franz Ferdinand of Austria was assassinated in 1914.
Morganatic marriageMorganatic marriage, sometimes called a left-handed marriage, is a marriage between people of unequal social rank, which in the context of royalty or other inherited title prevents the principal's position or privileges being passed to the spouse, or any children born of the marriage. The concept is most prevalent in German-speaking territories and countries most influenced by the customs of the German-speaking realms.
Archduke Franz Ferdinand of AustriaArchduke Franz Ferdinand Carl Ludwig Joseph Maria of Austria (18 December 1863 – 28 June 1914) was the heir presumptive to the throne of Austria-Hungary. His assassination in Sarajevo was the most immediate cause of World War I. Franz Ferdinand was the eldest son of Archduke Karl Ludwig of Austria, the younger brother of Emperor Franz Joseph I of Austria. Following the death of Crown Prince Rudolf in 1889 and the death of Karl Ludwig in 1896, Franz Ferdinand became the heir presumptive to the Austro-Hungarian throne.
Franz Joseph I of AustriaFranz Joseph I or Francis Joseph I (Franz Joseph Karl fʁants ˈjoːzɛf ˈkaʁl; 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 on 21 November 1916. In the early part of his reign, his realms and territories were referred to as the Austrian Empire, but were reconstituted as the dual monarchy of the Austro-Hungarian Empire in 1867.
