Violin made in 1743
Il Cannone Guarnerius of 1743 is a violin created by the Italian luthier Giuseppe Bartolomeo Guarneri of Cremona (1698–1744).
Il Cannone is also known by the variants "Il Cannone del Gesù", and the "Cannon", often appended with "Guarneri del Gesù", the Guarneri trademark. The violin received its name from a former owner, the Italian violin virtuoso Niccolò Paganini (1782–1840), because of its power and resonance. So associated is Paganini with "Il Cannone" that it is common for the violin to be referenced as "Il Cannone, ex Paganini".
Paganini lost a valuable Antonio Amati violin as a result of his penchant for voracious gambling. He was given a neglected Guarneri violin, a gift from an amateur violinist and businessman. Paganini played on this instrument for the rest of his life, fondly calling it “my cannon violin,” referring to the explosive sound that he was able to make it produce. He bequeathed it to the city of Genoa, Italy upon his death, and it is now considered a national treasure.
When in need of repair, "Il Cannone" would be sent to the Paris workshop of Jean Baptiste Vuillaume (1798–1875), the greatest luthier of his day. Not only did Vuillaume repair the Guarnerius, but he also made an exact replica. The copy was so exact, that not even Paganini could distinguish one from the other. It was not until Paganini noticed subtle differences in tone that he could identify the original. Paganini presented the copy to his only student, Camillo Sivori, who would later bequeath the instrument to the Municipality of Genoa, where it now is exhibited with the original "Il Cannone".
"Il Cannone" is exhibited alongside other Paganini memorabilia within the Paganini room of the Palazzo Doria-Tursi, the Genoa town hall. The original violin is maintained in playable condition, and is taken out and played monthly by its curator. The "Cannone" was played each year by the winner of the Premio Paganini contest for young violinists, which sees the Italian city attracting the cream of the crop of young violin performers (since 2002 the contest has been held every two years). On occasion, "Il Cannone" is loaned to musicians for performance. In 1996, violinist Eduard Schmieder was invited and gave a recital on "Il Cannone" in Genoa at the Palazzo Ducale for the audience of 2000 (with pianist Valentina Lisitsa); on this rare occasion, a posthumous International Peace Prize ceremony was given by the Italian government to Yitzhak Rabin. Violinist Shlomo Mintz performed a special "Il Cannone" concert on Paganini's violin with the Limburg Symphony Orchestra of the Netherlands, in 1997. In 1999, Eugene Fodor played "Il Cannone" at a special concert in San Francisco, California, USA. It was the farthest the violin had ever been from Italy. Conditions of its travel included a multi-million US dollar insurance policy and an armed escort of Italian police officers. The violin has been played several times by jazz violinist Regina Carter, who recorded an entire album with it, "". In February 2006, "Il Cannone" was taken to London's Royal Academy of Music, where it was displayed and played at a festival devoted to Paganini. 
The violin was the subject of the 2017 documentary "Strad Style", in which director Stefan Avalos follows manic-depressive violin maker Daniel Houck in his dilapidated rural Ohio farm as he makes an "Il Cannone" replica for Razvan Stoica.
In 2019, the violin journeyed to Columbus, Ohio, for a one-week display at the Columbus Museum of Art under the auspices of the Columbus-Genoa sister cities relationship. Columbus Symphony concertmaster Joanna Frankel performed a single concert on the instrument.
Italian violinist Francesca Dego recorded an album of Paganini-themed music with "Cannone" in 2019.
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