A combination photo shows the destroyed National Library hall after shelling in the besieged Bosnian capital of Sarajevo on August 26, 1992 (bottom), and the same hall after its renovation on May 8, 2014. Sarajevo's landmark 19th century city hall-turned-National Library will re-open on May 9, 2014 with its old glory fully restored, after it was reduced to rubble by Serb shelling in the summer of 1992. The re-opening of the city's beloved Vijecnica is one in a series of events that will mark the centenary of the start of World War One, triggered by the June 28, 1914 killing of Austrian Archduke Franz Ferdinand and his wife Sofia in Sarajevo. A graceful pseudo-Moorish building and a source of civic pride, the hall was burned out in Serb fire in August 1992, nearly 100 years after it was built. The Bosnian Serb 43-month siege of Sarajevo from 1992-95 was Europe's longest after World War Two. REUTERS/Hidajet Delic (bottom)/Dado Ruvic (BOSNIA AND HERZEGOVINA - Tags: SOCIETY CONFLICT)