The advent of the 21st century marks the unfolding of a new urbanism, of a new urban fabric in the making. Bringing together a range of leading scholars from a wide range of disciplines, this edited collection examines innovative urban redevelopment projects around Europe and North America which are at the forefront of this new urbanism and which are here termed 'New Downtowns'. It introduces this term and concept and addresses major questions such as: What does a sustained urbanity for the 21st century look like? Which strategies do politicians and planners deploy to create new synergies between planning for the public good and private interest? Can market forces be co-opted for collective interests? Does the imagination of a European city continue to inspire new urbanism within and beyond Europe? And can a future urbanity for the 21st century be planned at all? In particular, it focuses on Hamburg's HafenCity", which, at around 155 hectares, is one of the most prominent city centre development projects in Europe and will increase the size of Hamburg's city centre by 40 percent. The project HafenCity serves as a starting point for a conceptually wide ranging debate on the character, shape, function and meaning of New Downtowns.