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 replicas and reinterpretations confirmed its attribution to Leonardo da Vinci. In 2011, the Prado museum in Madrid, Spain, announced discovery of what may be the earliest known replica. Miguel Falomir, heading the Department of Italian Renaissance Painting at the time of the discovery, stated the Prado "had no idea of (the painting's) significance" until a recent restoration. Recovered from the Prado's vaults, the replica – which El Mundo newspaper dubbed ""Mona Lisa"'s twin" ("above, far right") – was reportedly painted simultaneously alongside Leonardo as he painted his own "Mona Lisa"; in the same studio, by a "key" student. It was painted on walnut.