This article is a synopsis of a paper titled "The Influence of Reinforced Concrete and Technical and Scientific Progress on the Architecture of Today and Tomorrow." As a result of improvement in techniques for making formwork, concrete construction now offers a flexibility of design never before available in architecture. We have come into "possession of a material which is highly resistant and has the disconcerting property of starting off plastic and being able to take the shape of whatever mold it is poured into." In the field of flat structures, the use of mobile formwork, built of ‘ferro-cemento,' has permitted freer disposition of structural ribs. The preparation of these forms is relatively easy and in large buildings a triple saving results from their low initial cost, from using them repetitively and from the perfection of ceiling finish they achieve which eliminates all need for plastering. These ferro-cemento formworks are made by spreading a high quality mortar of cement and sand onto a widely spread reinforcement made of layers of wire netting and rods of small diameter. Problems arise with this technique in deciding the quantity and method of application of oil, in the design of the mobile scaffolding, the profile of the ribs, the dimensions of the bays and in linking the spans together. Such work demands experience "above all, in the foreman and skilled operatives on the site." "The system has many possibilities. Its essence is that it allows the transformation of any cage of rods and wire netting into a concrete structure. From the structural point of view, when the combination of fabric and rods gives an evenly distributed metal content of about 300 to 400 kilograms per cubic meter of cement mortar, you obtain a very resistant material which is practically waterproof and will not crack. In the field of thin vaults it allows a freedom of architectural expression out of the question in any other type of construction.