Luce per la ricostruzione filologica e per riconfigurare lo spazio architettonico. La Biblioteca di Santa Marta a Firenze Lighting for a philological reconstruction and architectural reconfiguration of space. The Library of Santa Marta, Florence

The subject of light is wide, and encompasses life, work, health, the function of space and that of the historical buildings, the latter often belonging to the ultural Heritage. Moreover, it is linked to strong and complex symbolic, historical and cultural meanings with both social, educational, economic, political, and nergetic values and implications. Through this research, we developed an environmental experimentation and monitoring method in constant reference to he information content that light can deliver. The analysis of the measured experimental data was carried out considering not only the compliance with the limit values (the amount of light) suggested by the current standards, also regarding the protection and preventive conservation, but also the respect to the initeness of the usable negentropy flow (the quality of light), coming from the Sun and the Sky and from other sources of artificial light, both necessary for The philological reconstruction and the architectural reconfiguration of the internal space of a church, which is today a university library, known as the Santa Marta Library in Florence. The study of the present state of the natural light and of the lighting was extensive, demanding and complex, but it allowed us to Identify the information contents, or the signals, and the critical points, as well as the historical and philological elements and characters that the light, interpreted and read as a signal transmission channel, can transfer and communicate.