The former Comptoir National d’Escompte de Paris headquarters, originally designed by the architect Edouard-Jules Corroyer in the end of the 19th century, is an acknowledge registered Historic Monuments for which the refurbishement’s top priority was the respect of the spiritual, cultural and historical heritage of the building. The project’s contemporary architecture revisites the parisian Haussmannian style drawn up by Corroyer and proposes a new design of « stone and steel » to adapt it to new contemporary life styles. The interior design was completely rethought in order to optimize the volumes, space, and circulation to offer the most natural light. The project is the first refurbished building in Paris to have obtain the HQE certification.