Witnesses describe the moment in which a man disguised as an elderly woman in a wheelchair threw a cake at the Mona Lisa as "jaw-dropping."

The iconic painting by Leonardo da Vinci remained untouched in the attack at the Louvre in Paris on Sunday since only a trace of white cream was left on its protective glass.

As individuals were escorted away from the scene, the culprit, wearing a wig and lipstick, urged them to "consider the Earth."

Klevis, who did not desire to reveal his second name, was at the Louvre following Liverpool FC's 1-0 loss to Real Madrid in the UEFA Champions League final at the Stade de France.

The 26-year-old Albanian told the PA news agency that he experienced conflicting emotions, including sadness and disappointment.

"I came to Paris for the match, and my second intention was to view the Mona Lisa.

"A man clad as an elderly lady in a wheelchair attacked it with a cake."

What were the odds that this would occur?

A track and field athlete from Denver, Colorado, Luke Sundberg, witnessed the incident while waiting in line to watch the artwork.

The 20-year-old told PA that the audience began screaming when a man in a wheelchair dressed as an older woman went up to the mural and started pounding it before pouring cake.

"It took between 10 and 15 seconds for security to remove the man, but the audience appeared to panic for a while.

"It was awe-inspiring, it was a lot to take in considering how historic the Mona Lisa is... it was a once-in-a-lifetime experience."

Additionally, the activist was observed tossing roses in the gallery.

As he was being led out by security, he was overheard saying, "Consider the planet. Some individuals are killing the planet. Consider the matter carefully. Artists advise you to consider the Earth. This is why I did it."

Mr. Sundberg's footage showed a gathering near the painting applauding after the cream was removed from the glass.

The 16th-century piece was protected by glass in the 1950s following an acid assault.