This book rehearses a vision of modern architecture aimed at differentiating its rational aspects from those that are a consequence of emotion. The analysis is carried out on twelve masterpieces of modern architecture and allows us to observe, from this point of view, the architects Asplund, Coderch, Libera, Wright, Le Corbusier, Melnikov, Aalto, MIES, and to confirm, once m, that art is only complete quan supposes a menifation of the artist's fullness.