On view until September 14, 2026 as part of the Chiaroscuro exhibition is ‘Cloud #07156,’ a fog sculpture by Japanese artist Fujiko Nakaya installed in the Rotunda of the Bourse de Commerce (boursedecommerce). Using a system of high-pressure pumps and nozzles she developed with engineer Thomas Mee in 1969, Nakaya produces microdroplets of water identical to natural fog, filling Tadao Ando’s concrete rotunda with a thick white cloud that visitors walk through, watching each other appear and disappear inside it. Chiaroscuro, meaning “light-dark” in Italian, is a technique rooted in Renaissance painting that uses strong contrasts between light and shadow to give flat images a sense of depth and volume. Nakaya’s fog operates as a living, three-dimensional version of that same principle: instead of paint creating the illusion of obscured and illuminated form, the fog itself becomes the medium, constantly shifting between visibility and concealment as it moves through the space. Where the e...