Crossing culture, society and living environment, the Horizome collective accompanies and questions the urban and societal transformations of these neighbourhoods, through field support, in the artistic and urban design fields (creation, transmission, mediation/dissemination). To do this, Horizome designs and applies a collaborative method that aims to involve inhabitants, partners, curious, amateurs, experts in the definition (co-understanding), imagination (co-design), and the realisation (co-construction) of artistic, cultural and citizen projects. Through its collaborative posture and its presence in the public space, Horizome is in contact with unacquired audiences, and often unaccustomed to associative places available in the neighborhood. Constantly listening to these people, their needs, expectations and initiatives, Horizome has therefore developed an axis around professionalising support for all these germinated projects: Nursery².