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 Silesia
As part of the Lands of the Bohemian Crown, Silesia was inherited by the Habsburg archduke Ferdinand I of Austria in 1526, after the last Jagiellon king Louis II of Bohemia had died at the Battle of Mohács. With the female succession of the Habsburg empress Maria Theresa to the throne in 1740, the Prussian king Frederick the Great laid claim to the Silesian province and, without waiting for any reply, on 16 December started the First Silesian War, thereby opening the larger War of the Austrian Succession. His campaign was concluded in 1742 with the Prussian victory at the Battle of Chotusitz leading to the treaties of Breslau and Berlin, in which Silesia was divided.