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
Italian submarine Leonardo da Vinci (1939) "Leonardo da Vinci" was assigned to a special operation aimed at mounting raids on harbours on the eastern seaboard of the United States. To this end she was converted to carry a , and during the autumn engaged in trials with the new weapon. However, the operation was delayed due to the need for modifications to the CA craft and "Leonardo da Vinci" returned to action to the Atlantic. On 19 March 1943 "Leonardo da Vinci" torpedoed and sank the 7,628 ton British cargo ship in the South Atlantic. "Leonardo da Vinci" captured and took on board one survivor; two