How can we express today, in contemporary architecture, the geometrical-compositive possibilities of a formal conception based on modular pre-structured (prefabricated) units? And how can we compare this formal conception to the most topical needs, as those imposed by saving environmental resources or those, more dramatic, represented by the so-called mobile settlements: human flows in constant motion or the consequences of natural disasters? Is it possible to find a solution, as response to these issues, which models the geometry of the temporary aggregate in relation to the shape of its basic modules? The needs of a historical analysis are rediscovered in the most topical architectural solutions for construction of temporary structures: Therefore the article suggests, a particular interpretation of fractal geometry, as the generating principle of constructive solutions that fully exploit the physical and formal properties of the elemental building units. The pre-structured cell becomes, today, the generative element of a ndimensions building, that dilates more and more according to the intuition of Rudolph Kronenburg that identified the movable cell as “the brick" of the twentieth century. Under what kind of added values can we impose a constructive conception, in which the architectural form, looks like, scaled, the smallest element that constitutes it?