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.
Beatrice von Dovsky
Beatrice von Dovsky (14 November 1866, Vienna – 18 July 1923, Vienna) was an Austrian poet, writer, and actress. She is best known for writing the libretto for Max von Schillings's opera "Mona Lisa" which she presented to the composer in the spring of 1913. The subject was very topical at the time, because the painting by Leonardo da Vinci had been stolen from the Louvre in 1911, and rediscovered in Florence in 1913. The opera premiered successfully at the Staatsoper Stuttgart in September 1915, and, while not part of the standard opera repertory, has been commercially recorded three times and revived numerous times by major opera houses throughout the 20th century.
Dovsky's other works include poems, short stories and works for children. Her fairy tales are among her more well known works, including "Der Wiener Fratz", "Die Gnä' Frau", and "Zwölf Märchen aus der Ostmark" among others. She was also active as a stage actress in Vienna. She died in 1923 at the age of 57 and is buried in the Hietzinger Cemetery.