Stereographs became a very popular entertainment medium from the 1850s to the 1930s, though a few companies continued to produce stereographic images until the 1970s. Many different photographic processes were used to produce stereographs, including daguerreotypes, ambrotypes, wet plate glass positives, salt paper prints, albumen prints, and gelatin prints. Stereographs were formed of two images placed side by side and mounted on cardboard. They were... commonly produced with cameras that had two lenses side by side. Stereographic cards were produced in the millions by photographers all over the world. Invented in England, the novelty and attraction of stereograph formats spread across Europe and the United States.

Stereographs provided a very popular entertainment medium predating television and film. Keystone and Underwood produced stereographic sets packaged in box sets with spines that resembled classic book bindings, accompanied by descriptive guide books written by recognized scholars, copyrighted maps depicting the exact location of the photograph, and the arrangement of sets by subject intended for primary and secondary school instruction. Stereographic views cover a diverse range of subjects and include topographic views, local history, events, industries and trade, urban and country life, portraits of famous people, and the production of box sets of World War I and World War II. The box sets ranged in size from 50 to 200 images per box, and were viewed through a stereoscope, which produced a unique three-dimensional (3-D) effect.