"Franz Ferdinand (18 December 1863? 28 June 1914) was an Archduke of Austria-Este, Austro-Hungarian and Royal Prince of Hungary and of Bohemia, and from 1889 until his death, heir presumptive to the Austro-Hungarian throne. His assassination in Sarajevo precipitated Austria-Hungary's declaration of war against Serbia. This caused the Central Powers (including Germany and Austria-Hungary) and the Allies of World War I (countries allied with Serbia...

"Charles I ... (17 August 1887 - 1 April 1922) was (among other titles) the last ruler of the Austro-Hungarian Empire. He was the last Emperor of Austria, the last King of Hungary, [1] the last King of Bohemia, Croatia and the last King of Galicia and Lodomeria and the last monarch of the House of Habsburg-Lorraine. He reigned as Charles I as Emperor of Austria and Charles IV as King of Hungary from 1916 until 1918, when he "renounced participation"...