The new Grimm library and media center is conceived as a series of light environments. In the Grimm Zentrum, several lighting devices generate specific light conditions within the building which define the type of activities and interaction between users :A sunken garden as the ideal indirect light for the multimedia space Large light wells crossing the whole height of the building define the space of the reading room Roof patios for the book processing offices hamfer windows in the thickness of the façade as light reflector for individual working and reading carrels.