Guy Lagneau (1915 – 16 December 1996) was a French architect, one of the founders of Atelier LWD, who was involved in many major projects in France and Africa.

[3] As a student at the École des Beaux-Arts, in the Perret-Courtois studio, he designed a hotel at the edge of a lake, with a symmetrical but rhythmic structure of exposed reinforced concrete.

[8] In March 1958, Lagneau unveiled the House of the Sahara, a home-made prototype made in collaboration with Weill, Dimitrijevic, Prouvé and Perriand.

Lagneau worked closely with the curator, Reynold Arnoult to develop a flexible space in harmony with the marine environment.

Installed above the roof, the aluminum louver blades were created by the engineer Jean Prouvé, providing control over the natural light that floods the building.

Le Signal, a concrete sculpture by Henri Georges Adam, frames a fragment of the landscape and strongly emphasizes the exceptional situation of the building at the harbor entrance.

Inspired by the Japanese architect Kenzo Tange, who designed a city built on blocks to allow free movement on the ground and easy installation of equipment, Lagneau decided to place the administrative buildings on pillars.

[4] In the late 1970s he designed the 120,000 square metres (1,300,000 sq ft) Quatre-Temps shopping center in La Défense, a business district of Paris, which opened in 1981.