She has not lost her legendary smile, thanks to its protective glass: "The Mona Lisa", the most famous painting in the world, was entarred on Sunday at the Louvre Museum in Paris, without consequence since it is placed behind a glass shielded, according to testimonies on social networks.

Solicited Sunday evening by AFP, the Louvre museum replied Monday that it did not wish to comment.

According to photos and testimonies posted by tourists on Twitter or Instagram on Sunday, the incident happened in the early afternoon.

Several photos show the protective glass of "The Mona Lisa" smeared with cream, which is cleaned by a man who seems to be a museum guard.

A Twitter user, who says he was present during the incident, claims the perpetrator was a disguised man with a wig, who got up from a wheelchair to hit the bulletproof glass, before to throw a cake at her.

This Twitter user (@lukeXC2002) also posts a video in which the man in question is seen standing next to his wheelchair and being escorted out by security.

“There are people who are destroying the Earth (...) All artists, think of the Earth. That's why I did this. Think of the planet”, says, in French, the man dressed in white, wig and cap on his head.

In other images, the wheelchair can be seen placed behind the security cordon which visitors should not normally pass. No photos or videos captured the incident itself.

This is not the first time that Leonardo da Vinci's famous painting has been the victim of vandalism.

In August 2009, a Russian visitor to the Louvre was arrested after throwing an empty teacup in the direction of "La Joconde". The museum then explained that the cup had broken against the armored display case, which had been very slightly scratched.

In December 1956, a Bolivian threw a stone at “La Joconde”, damaging her left elbow. After that, she had been placed behind a secure display case.

Presented since 2005 behind armored glass, protected by a special box where humidity and temperature are controlled, "The Mona Lisa" sees millions of people parade each year who come to admire it in the largest museum in the world (ten million visitors per year before COVID-19).