International audiencePopulation decline in former industrial cities is an undeniable fact and preparing to respond to it is a necessity. In my research urban sustainability is defined as a process to recover from social and economic recession which are usually linked to deindustrialization. The main goal is to survey how Nantes and Saint-Ouen became resilient after the period of deindustrialization and if they have the needed capacities of urban sustainability in dealing with population decline. The research method is descriptive-analytic. The descriptive method is used in order to define urban sustainability and relate it to previous studies in shrinking cities. The analytic method is used in order to identify the reasons that led to the ...