History
The painting, belonging to Leonardo da Vinci, dating from the period between 1503 and 1506. It is an oil on poplar board 77 x 53 cm, whose technique used was the "sfumato", a procedure typical of Leonardo da Vinci in the overlapping layers of paint very thin and delicate, achieving an effect that vaguely vaporous contours giving a sensation of blurring.

In addition, the artist would play with perspective, and drawing a horizon higher than another, what makes the Mona Lisa showing higher if viewed from the right side.

The work is owned by the French State since the sixteenth century and can be seen in the Louvre Museum in Paris.

But despite the many technical and historical information you have about the Mona Lisa, the truth is you never have gotten to know a number of things: who is this mysterious woman and, above all, why she smiles.

According to information gathered, processed and even historical studies, the next most popular argument is that this woman was the wife of Francesco Bartolomeo del Giocondo (hence "La Gioconda"), whose name was Lisa Gherardini.

This theory would be supported in his book "Mona Lisa, naive woman" the Italian historian Giuseppe Pallanti, convinced that it was Gherardini, a lady of Florence would have married a second time with Francesco. This would have been widowed and would have had five children with Lisa offspring. According to studies, would have married when Lisa was 16 and had posed for Leonardo when he was 24 or 25.
The historian would have called "donna naive" because it was a pet name that her husband used.

Other hypotheses suggest that it was a courtesan, or an unrealistic model imagined by the artist. Even, it has been said that it was Leonardo's own.

However, the initial thesis seems the most convincing. Pallanti gives evidence of that. Thus, it would confirm the theories discussed by the Italian writer Giorgio Vasari in "Lives of the finest painters, sculptors, architects and Italians", published in 1550 and would be expanded in 1568.

Once this is finalized, the question is what do you laugh in Mona Lisa?

To Yale University in the United States we come to explain the research conducted there. They say the lady smiles because he is expecting a child. One reason is that, as the symptom of a pregnant woman, Lisa's hands are swollen. Moreover, the way they rest on the stomach gives the illusion of protection for your baby.

It is said that Leonardo painted it by getting an effect if you look directly where the smile, it disappears and reappears only when you notice any other part of the picture.

Either way, it has never come to know the true state of mind of the Mona Lisa. What lies behind this mysterious and baffling smile that seems to look as mischievous, protective, sad, calm or even malevolent.

So rest myths and legends referring to the work, especially when on 21 August 1911 he was stolen from the Louvre Museum. The author of such a theft would Vincenzo Perugia, who managed to get the police in December that year. After touring a number of cities like Florence, Rome and Milan, again, safe and sound, the Louvre in 1914.

He is currently protected by a very powerful security and protection systems. Likewise, it also ensured the survival of thousands of unknowns unanswered. Unknowns that always adorn the fame of the work.