Moretti's abundant imagination was given free rein, transforming a 32-meter ventilation shaft into an unusual, colorful work of art. Using 672 fiberglass tubes ranging from 2 to 30 centimeters in diameter, painted in 19 different colors, he covers the entire surface to emphasize the vertical volume, offering a cheeky, joyful dynamic.

In all, the tubes are 22 kilometers long and weigh a total of 27.5 tons!

The work was created in 1990. The tubes were transported by barge from the manufacturing plant to the chimney site, requiring a total of 2,100 hours of assembly. It was inaugurated in 1995.

Other works in the La Défense collection are also based on ventilation shafts:

• Mosaïque and Vive le vent by Michel Deverne;
• Cheminée végétalisée by Édouard François;
• Les Trois Arbres by Guy-Rachel Grataloup;
• Cheminées by Philolaos Tloupas.

Born in Nice in 1931 of Italian parents, Raymond Moretti was the front-page illustrator for "Magazine Littéraire" for over twenty years.
At the age of sixteen, he produced his first work, Moïse brisant les tables de la loi (Moses Breaking the Tablets of the Law), exhibited at the Jerusalem University Museum. His paintings evoke the Holocaust in Cris du monde, a series of twelve oil paintings exhibited at the Tel Aviv Museum.

With his friend Jean Cocteau, he paints gouaches and an oil. He meets Pablo Picasso, with whom he forges a close friendship. A man of passion, especially for jazz and La Défense, where he lives and creates.

In La Défense, Raymond Moretti also created a work, Pendule, installed in the Quatre Temps shopping center, but which was removed when the site was restored. Since 1973, his sculpture Le Monstre, occupying 1,000 m² on five floors, has been installed in the basement of La Défense, but is not visible to the public.
He died on June 3, 2005.