The photograph album contains over 200 images of the medieval church as well as supplementary autograph manuscript notes in the hand of a Frenchman identified as “M. Cottin.” The annotated photograph album and companion notebook contain text copied from Eugene-Emmanuel Viollet-le-Duc’s Dictionnaire raisonné de l’architecture française du XIe au XVIe siècle. It appears that the album was created as an early attempt to illustrate Viollet-le-Duc’s text on Notre Dame with photographs. Included in the collection are loose photographs, photostats, and miscellaneous documents that relate to the study of Notre Dame. A number of the photographs bear the stamp of French photographers Séraphin Médéric Mieusement and his son-in-law Paul Robert, as well as the stamp of the Commission des Monuments Historiques. The photographs in this album also serve as a visual record of the changes made to the cathedral during the Viollet-le-Duc restoration and document losses in exterior stonework due to acid rain, erosion, and World War II damage.