Isleworth Mona Lisa
According to Leonardo's early biographer Giorgio Vasari, Leonardo had started to paint "Mona Lisa" in 1503, but "left it unfinished". However, a fully finished painting of a "certain Florentine lady" surfaced again in 1517, shortly before Leonardo's death and in his private possession. The latter painting almost certainly is the one that now hangs in the Louvre. Based on this contradiction, supporters of the authenticity of the "Isleworth Mona Lisa" claim it is the unfinished "Mona Lisa", made at least partially by Leonardo, and the Louvre "Mona Lisa" a later version of it, made by Leonardo for his own use.
Mona Lisa replicas and reinterpretations
A replica of "Mona Lisa" publicized as the ""world's smallest"" was painted by Andrew Nichols of New Hampshire (USA) in 2011, intending "to break the record." Recreated at a 70:1 ratio, the miniature "Mona Lisa" measures approximately 1/4 by 7/16 inches (7 by 11 mm). Although his rendition drew media attention, it was never officially reported whether he had, in fact, broken any existing record. In 2013, a far smaller version of the painting, entitled the "Mini Lisa", was created by a Georgia Institute of Technology student named Keith Carroll. The replica was created to demonstrate a new scientific technique called thermochemical nanolithography (TCNL). The "Mini Lisa" was just wide, about 1/25,000th the size of the original.