Knowledge of facts forms the basis of theoretical concepts, and theory essentially influences practical decisions. If the factual basis of an existing system is essentially aItered, not only must the theory be changed, there must also be consequences in the practical field. In other words, at a time when the achievements of modern architecture are widely questioned, a reconsideration of its basic assumptions may not only be of scientific value but also of practical significance. The documentary work provokes consideration of what in fact forms the field of phenomena related to building. Consideration of studies from other disciplines will make it evident that basic problems essential to the understanding of the cultural history of building have not yet been clarified.
Documentation also reveals the lack of knowledge concerning the diversity of constructive systems.
In the same way, little is actually known about the motives which developed these systems. Interpretations of form or limited developmental theories thus essentially depend on analogies of external form. In this context documentation can point to lack of knowledge which calls for extensive field research. More field research would also have to be undertaken in this direction. In a second step, an extensive documentation would serve as the basis for reconstructions of development theory dealing with aspects such as material, structure, form, space etc.