History of Western civilization heir to the Austro-Hungarian throne, Franz Ferdinand, and he was assassinated on 28 June 1914 by a Yugoslav nationalist named Gavrilo Princip in the city of Sarajevo, at the time part of the Austro-Hungarian Empire. Although Serbia agreed to all but one point of the Austrian ultimatum (it did not take responsibility in planning the assassination but was ready to hand over any subject involved on its territory), Austria-Hungary was more than eager to declare war, attacked Serbia and effectively began World War I. Fearing the conquest of a fellow Slavic Orthodox nation, Russia declared war on Austria-Hungary. Germany responded
Archduke Felix of Austria Archduke Felix of Austria Archduke Felix of Austria (given names: "Felix Friedrich August Maria vom Siege Franz Joseph Peter Karl Anton Robert Otto Pius Michael Benedikt Sebastian Ignatius Marcus d'Aviano"; 31 May 1916 – 6 September 2011) was the last surviving child of the last Austrian Emperor Charles I and a member of the House of Habsburg. He was a younger brother of former Crown Prince Otto of Austria, who predeceased Felix by two months. Archduke Felix was born in the Schönbrunn Palace in Vienna the third son of the then heir presumptive to the throne of Austria-Hungary the Archduke