Each concrete box slides into cantilever above the reading room, which is located on the north side of the building, making the presence of the documents palpable. On the south side, the stepped form of the storage boxes supports the internal circulation of staff. A new perpendicular volume is created for the associated functions: reception, exhibition space, educational workshops and auditorium on the ground floor, offices and restaurant on the first floor. The reading room and the offices have a view onto a landscaped forecourt, which is accessible to everyone.