Why Mona Lisa is so expensive?

Related questions

1. What was the Louvre before it was a museum?
2. Is Paris on the Prime Meridian?
3. Why was the Louvre built?
4. Why is Louvre called Louvre?
5. Who built the pyramid at the Louvre?
6. Who Was Mona Lisa the person?
7. What is Opus Dei in Da Vinci Code?
8. What was IM Pei famous for?
9. Is Mona Lisa a real person?
10. Why does Mona Lisa smile?

Tags

1. #cheerfully
2. #changes
3. #vinci
4. #expression
5. #painting
6. #unusual
7. #depending
8. #blurred
9. #effect
10. #smile
11. #detail
12. #looked
13. #filter
14. #where
15. #homing
16. #smiling
17. #achieved
18. #livingstone
19. #demure