The notion of Transition - industrial, economic, ecological - has been in the last decade one of the responses to the need to rethink unsustainable productive structures for resource and energy consumption, waste production, emissions of climate-changing gases. An issue developed in time and particularly supported in recent periods by policies pushing for innovative development strategies derived from the principles of the circular economy for all production sectors. The volume collects contributions of research, experimental design and essays that contribute to rethinking the current statutes that oversee the architecture design in its process, realization and managing aspects, as well as formal, with particular reference to Technologies 4.0, Lifecycle extension, New formal paradigms, Circular urban systems.