The dress and the Sforza symbols shown at the upper part of the neckline of "Mona Lisa" tell us that the depicted lady is in fact Isabella of Aragon (1470-1524), daughter of King Alfonso II of Naples and wife of Duke Gian Galeazzo II Maria Sforza of Milan. However, we are nowadays so distant from the truth regarding "Mona Lisa" and the life of her great court painter Leonardo da Vinci that it is no longer enough to support this theory with contemporary written and pictorial historical sources....