Yves Chaudron clones of Leonardo's great portrait" while Valfierno made arrangements to steal the real painting. In the early hours of 21 August 1911, Louvre employee Vincenzo Peruggia and two accomplices carried the "Mona Lisa" out of the museum covered in a painter's smock. Decker asserts that six Chaudron copies had already been sent to the United States ahead of the theft and while the stolen original remained in France, Valfierno followed his fakes and sold each for up to 300,000. The original remained hidden for two years until Peruggia, presenting himself as Leonardo Vincenzo, tried to sell it in Florence, Italy.
Vincenzo Peruggia forger Yves Chaudron to make copies of the painting so he could sell them as the missing original. The copies would have gone up in value if the original were stolen. This theory is based entirely on a 1932 article by former Hearst journalist Karl Decker in "The Saturday Evening Post". Decker claimed to have known "Valfierno" and heard the story from him in 1913, promising not to print it until he learned of Valfierno's death. There is no external confirmation for this tale. Vincenzo Peruggia Vincenzo Peruggia (October 8, 1881 – October 8, 1925) was an Italian thief, most