Marion Waller is the director of the Pavillon de l’Arsenal, the Centre for Urban Planning and Architecture in Paris. An urban planner and philosopher, she worked at the City Hall between 2014 and 2023 as an Advisor to the Mayor on those topics. She was responsible for the ‘Reinventing Paris’ competition launched in 2014 and aimed at transforming 23 sites in Paris. She has taught at Sciences Po Paris, Ecole Polytechnique, and Université Paris Est.