Immense precautions are taken to protect the priceless da Vinci work.
Many paintings are moved around at the Louvre in Paris, but rarely is it one of the world's most iconic works.
Evolution of a Napoleonic Parliament
蒙娜麗莎- 維基百科,自由的百科全書
Mona Lisa, Ultimate Pop Culture Wiki
Today In History: January 8, 1963 - Leonardo da Vinci's masterpiece, t, Mona Lisa
Leonardo Da Vinci's Mona Lisa Not the Only One? Some Claim to Have Second Masterpiece
Mona Lisa gets caked in Louvre climate protest
蒙娜麗莎- 維基百科,自由的百科全書
Isleworth Mona Lisa - Wikipedia
Mona Lisa is moving - what does it take to keep her safe?
At the Louvre, Mona Lisa Is Alone, but Still Smiling - The New York Times