Due to several factors, cities in Europe and North America are stopping to grow. At the same time industrial processes are being delocalized and substituted by “clean industries”. Two new necessities arise: Where can the new labour and leisure activities be located close to the centre? What shall be done with the obsolete industrial tissues? The answer to these questions, if added, is obvious: part of the future city life will take place in the recycled industrial heritage. The paper uses 22@ plan in Barcelona as a case study.