Otto von Hasburg (20 November 1912—4 July 2011), full name Franz Joseph Otto Robert Maria Anton Karl Max Heinrich Sixtus Xavier Felix Renatus Ludwig Gaetan Pius Ignatius von Habsburg, was the last Crown Prince of the Austro-Hungarian Empire. His father, Charles, was the Emperor of Austria and the King of Hungary. The murder of his great uncle, Archduke Franz Ferdinand of Austria was the event that led to the start of World War I. His family fled Austria in 1919 after the war.