Inaugurated in 1996, the Bibliothque nationale de France (BnF) stands as one of the most significant works by architect Dominique Perrault. Located in the Tolbiac district of Paris, this iconic structure is distinguished by its bold architectural vision that challenges traditional library conventions.Designed during a period of profound urban transformation, the BnF is composed of four corner towers that evoke the image of open books. These vertical elements, clad in glass and steel, rise above the urban landscape, creating a fascinating contrast with the sites horizontal lines. Perraults idea was to make the knowledge contained within the library visible, symbolized by the books opening towards the sky.The innovative use of underground space is another distinctive aspect of the project. Most of the reading rooms and archives are located below ground level, creating a quiet and protected environment. This approach not only maximizes the use of available land but also helps reduce the visual impact of the structure on the surrounding area.