A French government circular of October 20, 1906 authorized the use of reinforced concrete as a building material.
Since 1897, reinforced concrete and its techniques had been part of the curriculum at France's Ecole des Ponts et Chaussées. Future civil engineers who received this training included Eugène Freyssinet, the father of pre-stressed concrete, which was patented in 1929.
After the Second World War, strong demand for housing drove the development of prefabrication. From 1950 to 1965, the number of housing units built each year in France rose from 50,000 to over 550,000. Concrete had come into its own!