Delivered in 2001, the tower completes a project that began a quarter of a century earlier. The first studies were undertaken in 1984. Henri La Fonta was approached to be the project manager for a building that he wanted to be triangular in shape. A few years later, in association with the Chaix et Morel agency, he drew up new plans for a 150-meter-high hemicylindrical tower. But in the end, it was the Peï, Freed and Partners and SRA Architectes consortium that won the contract. The project, which included a covered forecourt using the tower's almond-shaped indentation, won unanimous approval.

The Légende Tower is a perfect example of architectural prowess. With a length of 70 m and a maximum width of 32 m, it is wider at the top than at the base. The entrance, located on the Parvis side, is punctuated by a 24 m diameter canopy that gives it a majestic appearance while protecting pedestrians.

Interestingly, the top of the Légende Tower is the same height as that of the Grande Arche.

In 2023, work was undertaken on the common areas to improve user comfort and offer new services. Users can now enjoy a panoramic restaurant, a wellness and sports area, an auditorium, and meeting rooms. The top two floors are connected by a transparent staircase to facilitate movement at the top of the tower.

Founded in New York in 1955 under the name I.M. Pei and Associates, the Pei, Cobb, Freed and Partners agency changed its name in 1989, the year in which Ieoh Ming Pei (1917) completed the Louvre Pyramid.

Considered one of the most important American firms of the post-war period, it has carried out projects all over the world: the extension of the National Gallery in Washington, the design of the Miho Museum near Tokyo, the construction of the John Hancock Tower in Boston, and more.

The agency has been involved in the Tête Défense project since 1973. After Pei's retirement in 1990, his partner, Henry N. Cobb, took over the reins. At the head of Pei, Cobb, Freed and Partners, he designed two office buildings near the GDF-Suez tower: Adamas and Pyramidion.