Portrait of Mona Lisa (1479-1528), also known as La Gioconda, the wife of Francesco del Giocondo; 1503-06; Oil on wood, 77 x 53 cm (30 x 20 7/8 in); Musee du Louvre, Paris.

This figure of a woman, dressed in the Florentine fashion of her day and seated in a visionary, mountainous landscape, is a remarkable instance of Leonardo's sfumato technique of soft, heavily shaded modeling. The Mona Lisa's enigmatic expression, which seems both alluring and aloof, has given the portrait universal fame.

If we now return to the Mona Lisa, we may understand something of its mysterious effect. We see that Leonardo has used the means of his 'sfumato' with the utmost deliberation. Everyone who has ever tried to draw or scribble a face knows that what we call its expression rests mainly in two features: the corners of the mouth, and the corners of the eyes. Now it is precisely these parts which Leonardo has left deliberately indistinct, by letting them merge into a soft shadow. That is why we are never quite certain in what mood Mona Lisa is really looking at us. Her expression always seems just to elude us. It is not only vagueness, of course, which produces this effect. There is much more behind it. Leonardo has done a very daring thing, which perhaps only a painter of his consummate mastery could risk. If we look carefully at the picture, we see that the two sides do not quite match. This is most obvious in the fantastic dream landscape in the background. The horizon on the left side seems to lie much lower than the one on the right. Consequently, when we focus on the left side of the picture, the woman looks
somehow taller or more erect than if we focus on the right side. And her face, too, seems to change with this change of position, because, even here, the two sides do not quite match. But with all these sophisticated tricks, Leonardo might have produced a clever piece of jugglery rather than a great work of art, had he not known exactly how far he could go, and had he not counterbalanced his daring deviation from nature by an almost miraculous rendering of the living flesh.

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