The volume describes the process leading to the definition of the Porta Nuova area in all its phases. It brings together the voices of all the different actors who contributed to the project: producers, developers, public administrators, and all the planners who worked on the area - Cesar Pelli, Stefano Boeri, Cino Zucchi, Michele De Lucchi, Cucinella Architects and the Kpf Studio, among many others. With great attention to detail and to more technical aspects, the volume illustrates a crucial step in the transformation of Milan, which is increasingly set to become a point of reference at the crossroads between European and international models of urban development.