From the end of the 20th century, the digital tools have had a leaden place in most of the creation processes. Architecture as one more art manifestation is not excluded from suffering this phenomenon. The presence of digitalization in a project can start from the beginning of the idea to the results, that is why the work to be exposed in SIGraDi 2007 is a reflexion about the use of digital systems in the architectural creation processes, throughout an academic professional exercise developed in the final grade work “Project of refuntionalization” of building #4 in Manzana Sarrá in Old Havana, Cuba.