"Charles I or Karl I (Karl Franz Joseph Ludwig Hubert Georg Otto Maria; 17 August 1887 – 1 April 1922) was the last Emperor of Austria, the last King of Hungary (as Charles IV, Hungarian: IV. Károly), the last King of Bohemia (as Charles III, Czech: Karel III.), and the last monarch belonging to the House of Habsburg-Lorraine before the dissolution of Austria-Hungary. The son of Archduke Otto of Austria and Princess Maria Josepha of Saxony, Charles became heir presumptive of Emperor Franz Joseph after his uncle Archduke Franz Ferdinand of Austria was assassinated in 1914. In 1911, he married Princess Zita of Bourbon-Parma." - (en.wikipedia.org 13.03.2020)
