This text concerns the Bronisława Kopczyńska-Jaworska Ethnographic Archive in Łódź. In presenting the archive’s organization and contents the author concentrates on describing its collections of photographs from Kazimiera Zawistowicz-Adamska’s research and from a competition for workers’ photographs. In addition, she presents material from three long-term projects: on livestock shepherding and breeding in the Carpathians; changes in folk culture under the influence of industrialization; and the culture of the industrial textile workers of Łódź. Using these examples, she depicts the enormous value of the archival documents for today’s researchers.