Speculations about Mona Lisa he had had no access to the actual painting, said that after "every laboratory test possible" in 2004 and 2009 that "no inscriptions, letters or numbers, were discovered during the tests." and that "The ageing of the painting on wood has caused a great number of cracks to appear in the paint, which have caused a number of shapes to appear that have often been subject to over-interpretation". Speculations about Mona Lisa The 16th-century portrait Mona Lisa, or "La Gioconda" ("La Joconde"), painted in oil on a poplar panel by Leonardo da Vinci, has been the subject of a considerable
Mona Lisa (Prado's version) scientifically, the version with the most historical value. Furthermore, the replica was discovered to be possibly painted simultaneously by a student of Leonardo in the same studio where da Vinci painted his own "Mona Lisa". Among the pupils of Leonardo, Salaì or Francesco Melzi are the most plausible authors of the Prado's version, though other experts opine that the painting could have been executed by one of Leonardo's Spanish students. The origins of the "Prado's Mona Lisa" are linked to those of Leonardo's original, as both paintings were likely created simultaneously in the same studio. The first documentary reference was