The Museum of NON-VISIBLE Art
Composed entirely of ideas, the work that the Museum of Non-Visible Art showcases remains unseen.
Although the artworks themselves are not visible, the descriptions are readable, and open our eyes to a parallel world built of images and words. This world is not visible, but it exists, as surely as thought itself exists.
The Manifesto of MONA explains everything else about the why and how.
Source: https://museumofnonvisibleart.com/