After its recovery, the painting was exhibited all over Italy with banner headlines rejoicing its return and then returned to the Louvre in 1913. While the painting was famous before the theft, the notoriety it received from the newspaper headlines and the large scale police investigation helped the artwork become one of the best known in the world. Peruggia was released from jail after a short time and served in the Italian army during World War I. He later married, had one daughter, Celestina, returned to France, and continued to work as a painter decorator using his birth name Pietro Peruggia. He died on October 8, 1925 (his 44th birthday) in the town of Saint-Maur-des-Fossés, France. His death was not widely reported by the media; obituaries appeared mistakenly only when another Vincenzo Peruggia died in Haute-Savoie in 1947. There are currently two predominant theories regarding the theft of the "Mona Lisa". Peruggia said he did it for a patriotic reason: he wanted to bring the painting back for display in Italy "after it was stolen by Napoleon". Although perhaps sincere in his motive, Vincenzo may not have known that Leonardo da Vinci took this painting as a gift for Francis I when he moved to France to become a painter in his court during the 16th century, 250 years before Napoleon's birth. Experts have questioned the 'patriotism' motive on the grounds that—if 'patriotism' was the true motive—Peruggia would have donated the painting to an Italian museum, rather than have attempted to profit from its sale. The question of money is also confirmed by letters that Peruggia sent to his father after the theft. On December 22, 1911, four months after the theft, he wrote that Paris was where "I will make my fortune and that his (fortune) will arrive in one shot." The following year (1912), he wrote: "I am making a vow for you to live long and enjoy the prize that your son is about to realize for you and for all our family." Put on trial, the court agreed, to some extent, that Peruggia committed his crime for patriotic reasons and gave him a lenient sentence. He was sent to jail for one year and 15 days, but was hailed as a great patriot in Italy and served only seven months in jail. Another theory emerged later. The theft may have been encouraged or masterminded by Eduardo de Valfierno, a con-man who had commissioned the French art forger Yves Chaudron to make copies of the painting so he could sell them as the missing original.