A controversial sculpture by British artist Anish Kapoor on display in the gardens of France’s Palace of Versailles has been vandalized for a third time, with graffiti saying “respect art” scrawled on it, the royal chateau said Thursday.

Officially known as “Dirty Corner,” the 60-meter (200-foot) long, 10-meter high steel-and-rock abstract sculpture has become popularly known as the “queen’s vagina”.

It is set up in the garden of the chateau, which attracts five million tourists a year.

The phrase “Respect Art as U trust God” was scrawled over the artwork in large letters with pink paint, the management of the palace said, adding that security at the site would be stepped up with nighttime police patrols and new surveillance cameras.

But it did not attempt to explain the meaning of the graffiti, which could be interpreted as criticism or support for the artist

When it was first unveiled in June the piece was sprayed with yellow paint.   

On Sunday, it was vandalized for a second time when it was covered in anti-Semitic graffiti in white paint.

Phrases such as “Queen sacrificed, twice insulted” and “the second rape of the nation by deviant Jewish activism” covered the work.

Following that incident, the 61-year-old British-Indian artist said he wanted the graffiti to remain to bear witness to hatred.

France’s culture ministry agreed, and said panels next to the work would explain what happened.

AFP contributed to this report.