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Starting from the production experiences of the early twentieth century for iron fixtures, the paper deals with the technological aspects of the evolution of the section bars composing the Curtisa aluminum windows, from the simple hinged or sliding doors, up to the curtain wall façades.

The paper describes the history and the stylistic choices adopted in the construction of Palazzo Ronzani in Bologna, which was the first building to rise after the heavy demolitions carried out in the historical center of the city at the beginning of the twentieth century. In 1910, the local administration adopted a Detailed Plan to change the aspect of the city, as it was already happening in the main European capitals. In this context, starting from 1911, the architect and scenographer Gualtiero Pontoni designed...