Commissioned by Gecina, the Sunside building, formerly known as Pyramidion (part of the same real estate complex as Adamas), was renovated by the Axel Schoenert agency and delivered in 2021. The architectural firm restructured the 9,600 m² to improve the building's amenities and services.

The office floors were renovated to offer users greater comfort and landscaped terraces. The common areas were also redesigned. The building now features a restaurant, more modern and connected landings, and a fitness center on the top floor with views of La Défense. The renovation of the building's surroundings has simplified access to the lobby.

Axel Schoenert founded the Franco-German agency Axel Schoenert Architects with interior designer Zsofia Varnagy in Paris in 1999. With a multicultural team, the agency has expanded its activities in France and internationally in the fields of architecture, interior design, and design. Its priority is to promote an eclectic vision of its work, emphasizing the diversity of its projects and developing expertise in new construction as well as complex renovations. The agency is recognized and awarded for its hotel projects, its innovative office projects with iconic performance and design, as well as its coworking projects.