The aim of this paper is to investigate the possibilities opened up by radical interventions in public space: is it possible to foster reflection and create a critical methodology for analysing the topic of Commons in the urban context? Presenting the project “Stente: Residual Zones” as an example, the aim is to explore these questions using Umeå as a case study. Through the creation of an art/architectural object, the project seeks to use artistic and architectural practices as tools to engage city residents in an active dialogue about Common spaces. Starting with a theoretical framework for situating the critical potential of art and architectural objects in public spaces, in this paper the project is seen as an example of a temporary critical moving device, gathering and amplifying the voices of the inhabitants through the city: it aims to represent an open-ended invitation to reinterpret the boundaries between nature and the city, posing itself as a radical (from the latin radicalis) form of dissensus (Rancière 2010). The experiment was conducted at the Umeå School of Architecture between March and May 2024 as part of the “Designing the Contemporary City” research group at Umeå University.