SMS Viribus Unitis, an Austro-Hungarian battleship launched in 1911 and sunk in 1918
Other notable exhibits include the huge medieval bombard, Pumhart von Steyr, the original shipbuilder's model of the battleship SMS Viribus Unitis, flagship of the Austro-Hungarian naval fleet during World War I, a French observation balloon, the oldest surviving European aircraft, L'Intrépide, and the wreck of SM U-20, an Austro-Hungarian Navy submarine sunk in combat in 1918.
On 30 June, two days after Ferdinand and his wife were killed by Gavrilo Princip in the Bosnian city of Sarajevo, Viribus Unitis transported their bodies back to Trieste.