28 June 2014
Last updated at 09:10
Bosnia is commemorating 100 years since the assassination of Austrian Archduke Franz Ferdinand in Sarajevo, the act that triggered World War One.
Cultural and sporting events, including a concert by the Vienna Philharmonic, are marking the occasion in the city.
Gavrilo Princip, who shot the heir to the Austro-Hungarian throne, continues to be a divisive figure in Bosnia.
The shots fired by the Bosnian Serb on 28 June 1914 sucked Europe’s great powers into four years of warfare.
Bosnia’s Serbs, Croats and Muslim Bosniaks are still divided over the role Princip played in bringing tensions to a head in Europe in 1914, with counter-commemorations planned by Bosnian Serbs.
In Austria, Franz Ferdinand’s great-granddaughter and family will be holding events at the family castle at Artstetten, near Vienna, where he is buried.
Countdown to WW1
Leaders of Serbia and some Bosnian Serbs are boycotting official events, which they say are designed to incriminate Serbs.
On Friday, Serbs in eastern Sarajevo unveiled a statue of Princip, seen by them as a national hero who ended years of occupation of the Balkans by the Austro-Hungarian empire.
In the eastern town of Visegrad, actors will re-enact the murder of Archduke Ferdinand and his wife, Sophie, and the Belgrade Philharmonic will play music by Vivaldi.
Austrian Archduke Franz Ferdinand and his wife Sophie were shot dead in their car by Gavrilo Princip
Bosnian Serbs are planning to open the house in Obljaj where Gavrilo Princip was born in his honour
Thousands of cyclists joined the Sarajevo International Race for Peace to mark the centenary last week
The commemorations in central Sarajevo will take on a completely different tone to those in the east of the city, says the BBC’s Guy De Launey.
The Vienna Philharmonic will play a selection harking back to Hapsburg days, including Haydn’s Emperor Quartet, he adds.
The concert is being held at the newly-restored national library, which was destroyed during the 1992 siege of the city by Bosnian Serb forces in the Bosnian War.
Austrian President Heinz Fischer will be attending the concert, which is the centrepiece of official events marking the anniversary.
Commemorations are due to close with an open-air musical memorial event in Sarajevo.
Twenty-eight European Union leaders gathered on Thursday to mark 100 years since the beginning of World War One at Ypres in Belgium.
Princip and the shot that sparked WWI
- Gavrilo Princip, one of seven members of Mlada Bosnia (Young Bosnia), a Bosnian Serb militant organisation which wanted independence from Austria-Hungary
- Archduke Franz Ferdinand and wife Sophie shot dead in their car by Princip on 28 June 1914 in Sarajevo
- Austria responds angrily and declares war on Serbia, securing unconditional support from Germany
- Russia announces mobilisation of its troops
- Germany declares war on Russia, 1 August
- Britain declares war on Germany, 4 August
Gavrilo Princip: Remembering an assassin
Meanwhile, the UN cultural organisation Unesco has asked all vessels at sea to fly their flags at half-mast on Saturday to mark the assassination anniversary.
The organisation is trying to highlight its convention on underwater cultural heritage, designed to increase safeguards for thousands of sunken ships vulnerable to deliberate destruction and looting.
The agreement only applies to century-old wrecks so over the next four years, thousands of British, German and other ships lost in World War One will be added to the list.
Wrecked German warships at Scapa Flow in the Orkney Islands – seen here in 1919 before they were deliberately sunk – will fall under the UN convention in the next few years