The chapter introduces Gallica, a project hosted by the Bibliothèque nationale de France (BnF). Since its inception in the fourteenth century, the library has been developing new missions and striving to make collections more accessible. One key tool for the BnF is Gallica, an online digital library that concentrates much of the R&D conducted by the library to ensure accessibility. Since 1997, the project has been experimenting with new features, including HTR, OCR, image, and data mining, to facilitate research within its vast collection of ten million documents. The library employs an incremental approach to scaling up proof-of-concepts into industrialised innovations that can be used by its 60,000 daily users. Meanwhile, the development of artificial intelligence contributes to cultural changes within the library. Through its central role, the national library also shares its achievements with other libraries in France and at the European level.