A museum dedicated to street art and urban culture in Île-de-France? That's the exciting project set to come to life in Seine-Saint-Denis, part of the revitalization of the Rail Cathedrals. Named "L'Aérosol Saint-Denis", this new cultural space will occupy the historic former railway halls, which are listed as additional Monuments Historiques. Initially slated to open by 2028, the opening has now been rescheduled for 2029.