Museum rooms covered by terraces were added to the main hall, which was largely exposed. Old stucco and iron ornaments were uncovered, and the existing glass roof was used to create a large, bright gallery.
Side galleries were created on both sides of the basement and mezzanine, one dark and one light. In the darker rooms of the museum, the more delicate works of art were placed. Other exhibition rooms were created at the level of the vaulted roof, facing the Seine.
