The project consists of the renovation of a late nineteenth-century building in the historic center of a small town in the province of Bergamo, originally built as an elementary school. The intention was to make the building accessible to citizens, renovating and expanding the original structure to transform it into the new municipal library, thus becoming a cultural center. The C-shaped plan of the original building and the need for more space suggested the addition of a new block on the open side, thus creating an internal courtyard and transforming the building into a more imposing "palace" around a courtyard. The new volume is connected only through the basement, maintaining a studied physical and morphological distance from the existing building. The new structure takes the form of a triple-height bookcase, contained in a transparent shell or casket, protected by sunshades formed by terracotta books supported by a system of steel profiles that shield and filter the sunlight. This "diaphragm", characterized by the free rotation of the books, symbolically defines the character and meaning of the entire building.