The following article contains an answer for the question: What is the full name of the name of the Prime Minister that attended the opera that was delayed due to a possible bomb threat? , can you please find it? 

By December 1899, Tosca was in rehearsal at the Teatro Costanzi. Because of the Roman setting, Ricordi arranged a Roman premiere for the opera, even though this meant that Arturo Toscanini could not conduct it as Puccini had hoped—Toscanini was fully engaged at La Scala in Milan. Leopoldo Mugnone was appointed to conduct. The accomplished (but temperamental) soprano Hariclea Darclée was selected for the title role; Eugenio Giraldoni, whose father had originated many Verdi roles, became the first Scarpia. The young Enrico Caruso had hoped to create Cavaradossi, but was passed over in favour of the more experienced Emilio De Marchi. The performance was to be directed by Nino Vignuzzi, with stage designs by Adolfo Hohenstein.At the time of the premiere, Italy had experienced political and social unrest for several years. The start of the Holy Year in December 1899 attracted the religious to the city, but also brought threats from anarchists and other anticlericals. Police received warnings of an anarchist bombing of the theatre, and instructed Mugnone (who had survived a theatre bombing in Barcelona), that in an emergency he was to strike up the royal march. The unrest caused the premiere to be postponed by one day, to 14 January.By 1900, the premiere of a Puccini opera was a national event. Many Roman dignitaries attended, as did Queen Margherita, though she arrived late, after the first act. The Prime Minister of Italy, Luigi Pelloux was present, with several members of his cabinet. A number of Puccini's operatic rivals were there, including Franchetti, Pietro Mascagni, Francesco Cilea and Ildebrando Pizzetti. Shortly after the curtain was raised there was a disturbance in the back of the theatre, caused by latecomers attempting to enter the auditorium, and a shout of "Bring down the curtain!", at which Mugnone stopped the orchestra. A few moments later the opera began again, and proceeded without further disruption.The performance, while not quite the triumph that Puccini had hoped for, was generally...

Luigi Pelloux