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Guglielmo Oberdan, (born Wilhelm Oberdank) (February 1, 1858 - December 20, 1882) was an Italian irredentist. He was executed after a failed attempt to assassinate Austrian Emperor Francis Joseph, becoming a martyr of the Italian unification movement.
He was born in the city of Trieste, then part of the Austrian Empire. His mother was a Slovene woman from Šempas in the County of Gorizia and Gradisca, while his father, Valentino Falcier, was a Venetian soldier in the Austrian army. He did not recognize his son, so Wilhelm took his mother's surname. He was educated in an Italian cultural milieu, embraced irredentist ideas and Italianized his name to "Guglielmo Oberdan". In 1877 he enrolled at the Vienna's College of Technology (now Vienna University of Technology) where he studied engineering. As he supported the idea of independence for all of the empire's national groups he resented the occupation of Bosnia-Herzegovina by Austria-Hungary and therefore deserted from the Austro-Hungarian Army because he did not want to take part in military activities there. Instead, he fled to Rome to continue his studies. In the Italian capital he adopted irredentist ideas, aiming at the annexation to Italy of the Italian lands still under the Austro-Hungarian rule. In 1882 he met with irredentist leader and co-founder Matteo Renato Imbriani. It was then that he came to the conviction that only radical acts of martyrdom could bring the liberation of Trieste from Austrian rule.
The assassination attempt
In the same year, Emperor Franz Joseph was planning a visit to Trieste as part of the celebration of the 500th anniversary of Habsburg dominion over the city. Although the city had earned itself the honorific title of urbs fidelissima ("most faithful city") for its non-participation in the revolutions of the 1840s, the city was nonetheless a hotbed for Italian irredentists. The ceremonies were accompanied by anti-Austrian demonstrations. At this opportunity, Oberdan and Istrian pharmacist Donato Ragosa plotted an assassination attempt on the Emperor. Oberdan's attempt failed. Oberdan was arrested and sentenced to hang by an Austrian court. Just before the execution, he cried "Viva l'Italia!" (Long live Italy!), which helped establish his later reputation as a martyr of the Italian National cause. Statues of him were erected in towns and cities throughout unified Italy. The subsequent assassination of Archduke Franz Ferdinand in 1914, and the revival of irredentism that followed, harked back to Oberdan's earlier attempt.
In Trieste, one of the central squares carries his name (Piazza Oberdan). The Slovene writer Boris Pahor wrote a novel with that title, in which he incorporated the events from Oberdan's life. The Italian writer Enzo Bettiza also depicted Oberdan in his novel "The Ghost of Trieste", under the fictitious name of Stefano Nardenk (Narden).
A film adaptation of Oberdan's life was produced in 1915 by Tiber films of Rome. It starred Alberto Collo as Oberdan and was directed by Emilio Ghione, who also played the role of the governor of Trieste. It was one of a number of patriotic, irredentist films produced in Italy during World War One. Emilio Ghione met the irredentist Gabriele D'Annunzio at an invitational showing of the film in Rome and Ghione's inter-titles were praised by D'Annunzio. 
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- Emilio Ghione (March-December 1928). Memorie e Confessioni. Milan: Cinemalia magazine. p.78.
- Bled, Jean-Paul (1992). Franz Joseph. Cambridge: Blackwell Publishers. p. 230.
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