Ideal cities, utopias or human paradises have been imagined in detail by philosophers, poets, architects, social reformers, religious devotees, and artists for more than two thousand years. The attempt to invent the perfect city, cradle of the ideal society, is an abiding and ever-evolving vision embracing a wide variety of fascinating and often controversial movements and figures, including Plato, Filarete, Leonardo da Vinci, Thomas More, Thomas Jefferson, Claude-Nicolas Ledoux, Charles Fourier, Etienne Cabet, Robert Owen, William Morris, Ebenezer Howard, Bruno Taut, Le Corbusier, Frank Lloyd Wright, the European Situationalists, the Japanese Metabolists, Archigram, Superstudio, and many more. But what can we learn from these intelligent inventions? What is that image or concept of Paradise and Utopia about? What city concepts and social structures do these utopias proclaim?