Taken by the Austro-Hungarians in 1878, it became a centre of Slav opposition to Austrian rule. It was the scene in June 1914 of the assassination by a Bosnian Serb named Gavrilo Princip of Archduke Franz Ferdinand （1863-1914）, the heir to the Austrian throne, an event which triggered the outbreak of the First World War. The city suffered severely from the ethnic conflicts that followed the break-up of Yugoslavia in 1991, and was besieged by Bosnian Serb forces in the surrounding mountains from 1992 to 1994.