La Mina is a neighbourhood made up of blocks of flats that form part of the construction typology of the so-called absorption polygons or dormitory neighbourhoods, originated in the 1960s and 1970s. These were intended to be cheap, quick and easy to build housing so that they could accommodate a large part of the population that had previously lived in shantytowns. The buildings of La Mina Nova are a projection of the social, political, economic and urban history of Barcelona, located in Sant Adrià de Besòs. There are two characteristic blocks: those in Carrer Ponent, no. 2-12, and those in Carrer Llevant, no. 1-23. Both are linear blocks, but Carrer Llevant has a larger number of dwellings, with 486 flats and 26 business premises, while Carrer Ponent has only 60 dwellings and 6 business premises. The two façades are practically the same: it is a horizontal façade, configured in continuous longitudinal strips throughout the building, alternating a solid lock formed by the prefabricated concrete sills which are covered with a 3 mm metal sheet, used to protect the concrete from the weather and increase thermal insulation, and a lock. Historically, Sant Adrià de Besòs was an agricultural town, and the area now known as La Mina was characterised by an abundance of fields and some rural houses dedicated to farming. The existence of water mines used for irrigation is the explanation for the place name. The change from agricultural to industrial exploitation substantially affected the municipality, both in the urban and social spheres. Its location on the border with Barcelona, its access to the sea and the passage of the river favoured the establishment of different industries. These industries required a large workforce, making it possible to differentiate between two waves of immigration that conditioned the reality of Sant Adrià. In the first place, we find that of the 1920s and 1930s. The second wave was after the Spanish Civil War and the years that followed, when two different conditions accumulated: those who left for fear of being repressed by Franco's regime, and those who came to the Catalan capital in search of a job. In Barcelona, this resulted in large shantytowns, including Camp de la Bóta in Sant Adrià de Besòs. It is estimated that more than 10,000 shantytowns were built around Barcelona. In this context, in 1961, Barcelona approved a plan to eliminate shantytowns from the city. Thus, the current neighbourhood of La Mina was created to alleviate all the problems surrounding the shantytowns, being a housing estate that aimed to absorb the entire population of Camp de la Bóta and other shantytowns in Barcelona. The history of La Mina, then, began in 1967, with Porcioles as mayor of Barcelona, when the Barcelona town planning commission drew up a plan to build a residential area for shanty dwellers. The project stated that the neighbourhood was to have 2,100 homes, 7 kindergartens, 1 social centre, 1 health centre, 1 administrative centre and 1 parish centre. The reality is that the houses were built, but not most of the necessary facilities. La Mina was built in two phases and its architecture makes it easy to distinguish between them. Thus, the second phase, in 1972, is what we know as La Mina Nova - a group of buildings constructed with a tunnel formwork system, which allowed a very large number of dwellings to be built very quickly.