Unsolved mysteries about the Mona Lisa painting

Underneath the Mona Lisa's thin layer of paint are a series of codes, symbols and unusual structures that have left both artistic and scientific geniuses stumped.

1. The true identity of Mona Lisa remains controversial. Many believe she is Lisa Gherardini, the wife of a Florentine merchant, but theories about a male model or an idealized image of Da Vinci persist. Photo: Pinterest.

2. Mona Lisa's smile changes depending on the viewing angle. The sfumato technique that Da Vinci used makes her smile appear smiling or sad depending on the light and the position of the observer. Photo: Pinterest.

3. The mysterious background doesn’t match geographically. The landscape behind the Mona Lisa appears to be a strange mix of mountains, rivers, and trails – elements that don’t exist in real life. Photo: Pinterest.

4. The size of the painting is much smaller than many people imagine. At only about 77 x 53 cm, the Mona Lisa is actually much smaller than its enormous popularity would suggest. Photo: Pinterest.

5. There are many other versions of the Mona Lisa in the world . At least 10 ancient copies exist – including the "Nude Mona Lisa" and the "Young Mona Lisa" which have caused controversy over their origin and when they were painted. Photo: BBC.

6. The painting was once stolen from the Louvre. In 1911, an Italian worker stole the Mona Lisa and hid it for 2 years, making the painting an international media sensation. Photo: Pinterest.

7. There may be a secret message in her eyes. Some experts using high technology have discovered small characters in Mona Lisa's eyes, which could be letters or numbers encoded by Da Vinci. Photo: Pinterest.

Dear readers, please watch the video : Egypt discovers more ancient treasures with more than 100 coffins containing 2,500-year-old mummies | VTV24.

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