Causes of World War I corrective." British Diplomat Arthur Nicolson wrote in May 1914, “Since I have been at the Foreign Office I have not seen such calm waters.” On 28 June 1914, Archduke Franz Ferdinand of Austria, heir presumptive to the Austro-Hungarian throne, and his wife, Sophie, Duchess of Hohenberg, were shot dead, by two gun shots in Sarajevo by Gavrilo Princip, one of a group of six assassins (five Serbs and one Bosniak) coordinated by Danilo Ilić, a Bosnian Serb and a member of the Black Hand secret society. The assassination is significant because it was perceived by Austria-Hungary as an existential challenge
Archduke Leopold Franz of Austria Archduke Leopold Franz of Austria Archduke Leopold Franz of Austria () (born 25 October 1942 at Schloss Leutstetten in Starnberg, Bavaria, Nazi Germany) was a member of the Tuscan line of the House of Habsburg-Lorraine and Archduke and Prince of Austria, Prince of Hungary, Bohemia, and Tuscany by birth. Leopold Franz was the titular Grand Duke of Tuscany from 21 January 1984 to 18 June 1993. Leopold Franz was the third eldest child and only son of Archduke Gottfried of Austria and his wife Princess Dorothea of Bavaria. Leopold Franz married Laetitia de Belzunce d'Arenberg, eldest child and only daughter