NLM Digital CollectionsDigital Collections is the National Library of Medicine's free online repository of biomedical resources including books, manuscripts, still images, videos, and maps. The content in Digital Collections is freely available worldwide and, unless otherwise indicated, in the public domain. The majority of still images in Digital Collections come from the Images from the History of Medicine collection, including fine art, photographs, engravings, and posters that illustrate the social and historical aspects of medicine dating from the 15th to 21st century.