Mona Lisa and her iconic smile covered in cream.
On Sunday at the Louvre Museum, a 36-year-old man disguised as an old lady,
jumped out of a wheelchair and smeared cake on the painting whilst urging people to think of the planet.
"Think of the Earth! There are people who are destroying the Earth!"
Witnesses described the event as jaw-dropping, with social media taken by storm with the footage.
Thanks to the glass casing, the piece was left undamaged, and the perpetrator escorted out by security and an investigation is underway.
But this isn't the first time Leonardo da Vinci's most famous work has been attacked.
In 1956, she was put behind glass when a Bolivian student threw a rock at the painting, damaging her left elbow.
In 2009, a teacup was launched at her by a Russian tourist, scratching the case.
And the famous painting made headlines when she was stolen in 1911,
with French poet Guillaume Apollinaire and Spanish painter Pablo Picasso among the suspects behind it, but the thief was finally caught two years later.