The building where the Ethnological Museum of Puertollano is currently located, was built in 1918 by the Compañía Madrileña de Urbanización, for the Sociedad Hulleras de Puertollano. Hulleras de Puertollano. This company, with national capital, was set up to exploit the mines of San Francisco, La Isabel and Demasía. San Francisco, La Isabel and Demasía a San Francisco. The Ethnological Museum currently houses rooms in which elements relevant to the and contextualise elements relevant to the field of ethnography, the systematic study of people and cultures. systematic study of people and cultures.