PALEOLITHIC
Within Limpias and referring to this period, a series of artefacts were found by Father orenzo Sierra in the courtyard of the San Vicente de Paúl school, where they remained for years. Among them, a flint scraper, a natural-backed knife made from sandstone from the Castro del Retorín, and a scraper with a curved edge.
Part of this collection was donated to the Museum of Prehistory and Archaeology of Cantabria (MUPAC), while another part was lost when the school was used as a hospital during the Spanish Civil War.