Charles I of Austria
Charles I or Karl I (Karl Franz Joseph Ludwig Hubert Georg Otto Maria; 17 August 18871 April 1922) was the last Emperor of Austria, the last King of Hungary (as Charles IV, ), the last King of Bohemia (as Charles III), and the last monarch belonging to the House of Habsburg-Lorraine. After his uncle Archduke Franz Ferdinand of Austria was assassinated in 1914, Charles became heir presumptive of Emperor Franz Josef. Charles I reigned from 1916 until 1918, when he "renounced participation" in state affairs, but did not abdicate. He spent the remaining years of his life attempting to restore the monarchy until his death in 1922. Beatified by Pope John Paul II in 2004, he is known to the Catholic Church as Blessed Karl of Austria.
Austrian nobility
This may sometimes be confusing, as descendants of nobles are sometimes referred to with noble names abroad. Also, members of noble families often hold multiple citizenships, as was the case for Otto von Habsburg (eldest son of the last Emperor of Austria-Hungary and father of Karl Habsburg-Lothringen), who was also a citizen of Germany. The Austrian law does not apply to artistic, performer or stage names, where "von" is sometimes used, as in the case of conductor Herbert von Karajan or the musician Hubert von Goisern. However, stage names are never recognized for official purposes.