Franz Joseph I of Austria the Empire on 6 October 1908. However a diplomatic crisis erupted, as both the Serbs and the Italians demanded compensation for the annexation, which the Austro-Hungarian government refused to entertain. The incident was not resolved until the revision of the Treaty of Berlin in April 1909, exacerbating tensions between Austria-Hungary and the Serbs. On 28 June 1914 Franz Joseph's nephew and heir Archduke Franz Ferdinand, and his morganatic wife Sophie, Duchess of Hohenberg, were assassinated by Gavrilo Princip, a Yugoslav nationalist of Serbian ethnicity, during a visit to Sarajevo. When he heard the news of the assassination, Franz Joseph said
Archduke Joseph Ferdinand of Austria with more than 70,000 other Viennese. He was interrogated by the Gestapo and sent to Dachau concentration camp, where he was imprisoned for three months. The conditions in the camp ruined his health permanently. Joseph Ferdinand was released and lived an isolated existence thereafter, under continual observation by the Gestapo. He died on 28 August 1942 in Vienna. Archduke Joseph Ferdinand of Austria Archduke Joseph Ferdinand of Austria (24 May 1872 – 28 August 1942) was an Austro-Hungarian Archduke and the titular Grand Duke of Tuscany from 17 January 1908 to 2 May 1921, military commander, from 1916 Generaloberst, and