A ‘space’ becomes real when it presents understandable boundaries; this exercise aimed the definition of a basic unit of space. Following in an almost literal way what Deleuze and Guattari call ‘radicals’, it was intended an object devoid of any purpose other than to define a radical unit of ‘space’, while making it tangible. Like a glass sets in itself a limit of content, a set of walls would define a specific volume of space. The chosen site was a provocation: a roundabout on a busy suburban road axis. Placed slightly offset from the central axis of the circle, the object emerges as a calm sculptural piece contrasting with the noisy surroundings. The material chosen for the intervention was brick, in order to make the limits ‘concrete’: the tectonic and weight of the masonry would enhance the banality intended for the piece. In an attempt to achieve a level of abstraction the four walls would be painted in white.