Reinforced concrete, steel and glass have made it possible to extend the architectural vocabulary by the elimination of the dependence between structure and opening. The spatial limit no longer necessarily corresponds to the load-bearing structure. The space and the façade are ‘liberated’ and offer the possibility of a new dynamic. The instruments of this architecture are the glazed bay, the ribbon window, the corner window and the glazed wall which introduce a new spatial dimension consciously exploited by the Modern movement.
The differentiated and carefully studied treatment of the openings in Carlo Scarpa’s Castelvecchio Museum in Verona shows how this ‘discovery’ of the twentieth century is, in its turn, applied to the transformation of an old building. Scarpa makes ample use of a very rich register of means by adapting the type and treatment of each opening to its local situation without, however, losing the coherence of the whole.《 Elements of Architecture：From Form to Place 》