Le Galion, along with the Minerve housing complex and the school complex located at its base, occupies a triangular plot of land that was incorporated into the EPAD perimeter in 1969. Made of white cement concrete, the material of choice for Luc and Xavier Arsène-Henry, the building originally housed the headquarters of Screg, a company specializing in public works.

Compact in size, it is nevertheless softened by the curves and horizontality of the façade, as well as the contrast between the dark windows and the lightness of the concrete. Organized around a central garden, Le Galion features several terraces at the rear of the building.

Graduates of the Beaux-Arts in Paris, Luc (1924-1998) and Xavier (1919-2009) Arsène-Henry enjoyed successful careers until the 1980s. The two brothers made a name for themselves in 1953 with the Franciscan monastery La Clarté-Dieu in Orsay. They designed the building in white cement concrete, a material that quickly became their trademark.

They designed several residential, office, and administrative buildings and established themselves in Paris, Nîmes, and Bordeaux. In 1967, they built the Chartis Tower in La Défense, in association with Bernard Schoeller. This was followed by the Galion and the Minerve residential building.