Urbanization has evolved dramatically from monocentric settlements to polycentric networks and megacities of previously inconceivable size and population. This escalation of quantities and scales has ignited a deep and growing fascination for the phenomenon of megacities. The book’s point of departure is to define megacities and understand their processes and systems of organization. From this discussion it aims to glean lessons for researchers, practitioners, politicians and the general public. The Megacities Foundation, which initiated this discussion and book, has set a benchmark in the architectural profession, and has actively encouraged debate on megacities for the last fifteen years by inviting leading international academics and practitioners from the fields of architecture, economics, geography, sociology and urban planning. This book offers a compilation of the best lectures about the definition, evolution, governance and design guidelines of megacities. In addition, it incorporates reflections on what megacities could mean in the Dutch planning context. Megacities is a body of knowledge for comprehending the essence of urban growth and exploring a sustainable future.Urbanization has evolved dramatically from monocentric settlements to polycentric networks and megacities of previously inconceivable size and population. This escalation of quantities and scales has ignited a deep and growing fascination for the phenomenon of megacities. The book s point of departure is to define megacities and understand their processes and systems of organization. From this discussion it aims to glean lessons for researchers, practitioners, politicians and the general public. The Megacities Foundation, which initiated this discussion and book, has set a benchmark in the architectural profession, and has actively encouraged debate on megacities for the last fifteen years by inviting leading international academics and practitioners from the fields of architecture, economics, geography, sociology and urban planning. This book offers a compilation of the best lectures about the definition, evolution, governance and design guidelines of megacities. In addition, it incorporates reflections on what megacities could mean in the Dutch planning context. Megacities is a body of knowledge for comprehending the essence of urban growth and exploring a sustainable future.