Since its creation, the European Commission’s European Green Capital Award has been awarded to cities with more than 100,000 inhabitants that have promoted smart territorial planning policies and adopted solutions to make urban areas more environmentally friendly, as well as to develop a sustainable economy and guarantee satisfying life standards for their residents. As an initiative of the French Ministère du logement, de l’egalité des territories et de la ruralité, the EcoCité, ville de demain program promotes the cooperation between local administrations in order to address environmental and ecological issues and allocates ad hoc funding besides formally acknowledging outstanding environmental performances. From December 2015 through September 2016, some of the leading cities in urban transformation that have won the title of European Green Capitals (Hamburg, Nantes, Bristol, Ljubljana, Essen) since 2010, or have been declared Ecocité (Grenoble) contributed to the study days of the seventh edition of the “Barbara Cappochin” International Architecture Biennale. By reporting on their processes and the crossdisciplinary contributions provided by academics and representatives of research centers and Italian institutions, this book illustrates the strategies and good practices that have led several European urban regions, sometimes far away from the major centers of continental geopolitical interest, to become beacons of innovation. While these cities and their current layouts would not exactly provide opportunities for exploration, they nonetheless exemplify bold longterm planning skills and strategic vision, which are the ingredients for any believable process of actual regeneration of the urban building fabric and territory.