A beautiful art book accompanying the major autumn exhibition on Cobra artist Constant. There is increasing international attention for Constant, comparable to the growing popularity of Mondrian. We want to show New Babylon as much as possible worldwide, so that it continues to inspire young urban planners, architects, economists, and political leaders. Benno Tempel, director of the Gemeentemuseum Den Haag A world without borders. People who do not have to work, but thanks to complete automation are free to play and travel. Constant Nieuwenhuys (1920-2005) depicted his ideas about a new kind of human being (homo ludens), society, and architecture in one of the most visionary and extensive projects in post-war art history: New Babylon. He would work on it for almost twenty years, until 1974. To this day, his global city of the future remains a source of inspiration for many visual artists, thinkers, and architects, including Rem Koolhaas. This book not only highlights the versatility of the project itself, but also shows the various steps that led Constant from his Cobra period to this central project in his oeuvre. Beautiful models, drawings, maps, paintings, watercolors, and collages are interspersed with photographs, sketches, and other finds from his archive. Experiments such as the Ludieke trap (Playful Staircase) and the Deurenlabyrinth (Door Labyrinth) are also discussed, providing a complete picture of an extremely dynamic artist. With texts by Constant himself and contributions by Laura Stamps, Willemijn Stokvis, Mark Wigley, Pascal Gielen, Rem Koolhaas, and Trudy van der Horst. The book accompanying the major retrospective exhibition of Constant's work at the Gemeentemuseum Den Haag, from May 28 to September 25, 2016.