The Mona Lisa, oil on canvas, 1503-06, Musé du Louvre, Paris.

Why was Mona Lisa Smiling ?

Leonardo Da Vinci painted the Mona Lisa on a piece of pine wood in the year 1506.Never in the history of Art has one painting been so admired. This is due largely to the enigmatic smile, which has caused much speculation. He recorded in his notebooks the records of model sittings; but nowhere can be found any records of the Mona Lisa model sitting. Why is that? Who posed for him? Dr. Lillian Schwartz of Bell Labs suggests that Leonardo painted himself, and was able to support her theory by analyzing the facial features of Leonardo's face and that of the famous painting, She digitized both the self-portrait of the artist and the Mona Lisa. She flipped the self portrait and merged the two images together using a computer. She noticed the features of the face aligned perfectly!