The Old Blast Furnaces of Fundidora Monterrey are an extraordinary example of Mexican technological progress, because they are the origin of the first modern siderurgical company, fully integrated for steel production to be established in Latin America. It was constructed in the period of stability and industrial promotion of president Porfirio Díaz; an important period in Mexican history, when foreign investment was encouraged, which was a factor in the creation of Compañía Fundidora de Fierro y Acero de Monterrey. This, coupled with regional capitals, led to the installation of the first Blast Furnace. The company's legacy to Monterrey was not just its capital, but also its machines, its scientific discoveries applied to industry, its work management systems and its architecture. It was in these very Furnaces, in "la Maestranza" training facilities, where former farmers acquired new knowledge and skills, to give rise to a new lifestyle and a new social organization to build the foundations of the national history of work and labor culture.