France's leading shopping center in terms of revenue, Westfield Les Quatre Temps was originally intended to be dedicated to luxury boutiques and a 4-star hotel following its renovation in 2008. Of this initial project, only the ice rink saw the light of day, albeit briefly.

Combining shopping and leisure, the building extends lengthwise, straddling a large interior street with arcades, bathed in natural light. The key word for this project is light. The building is made entirely of glass and mirrors to capture and reflect the sun's rays. Inside, a 300-meter row of windows overlooks the esplanade and is directly accessible from the subway. A panoramic elevator provides vertical access, while the walls are adorned with works of art and engravings. Each space has its own identity.

Westfield Les Quatre Temps is a true architectural and technical feat. The columns spanning the four levels of parking are set on a 16-meter by 8-meter grid, a technique necessary to support the 530,000 tons of this colossal structure.

Guy Lagneau (1915–1996) and Jean Dimitrijevic (1926–2010) founded their agency in 1952, in partnership with Michel Weill (1914–2001). Known for their design of the André Malraux Museum of Fine Arts in Le Havre, the trio worked mainly in sub-Saharan Africa (Mauritania, Guinea, Senegal, etc.).

In the 1970s, they founded the Atelier d'études architecturales (ATEA) and turned their attention more towards international projects. Their arrival at the La Défense site was mainly the result of their friendship with Émile Aillaud, then consulting architect for the EPAD. They paid tribute to him by designing a lattice structure along the building, echoing the one Émile Aillaud had imagined for the same site.

Jean Philippe Lenclos (1938) is above all a colorist. A graduate of the École des Arts Décoratifs in Paris in 1960, he worked for numerous companies, including Nissan, Moulinex, Renault, and L'Oréal. A regular contributor to shopping centers, he worked on the Créteil shopping center in 1974, designed the plastic animation for the walls of Westfield Les Quatre Temps, and created his first logo.

SRA Architects was founded in 1996 by Jean Rouit, Hervé Metge, and Clémence Fiant-Saubot, daughter of Roger Saubot, Rouit's former employer. The firm quickly specialized in large-scale projects in collaboration with leading names in the architectural world.

In La Défense, the firm partnered with its American counterpart, Kohn Pedersen Fox, for the renovation of the Logica (formerly EDF-GDF) and First (formerly UAP) towers, as well as for the construction of the Dexia tower in 2005. SRA Architects also participated in projects for the Défense Plaza building, the Carpe Diem tower, and the Phare tower (a project abandoned in 2015).