The site "contains links to over 1200 digitized photographs and images recorded during the Siege and Commune of Paris cir.1871.[...] The originals are located in the Charles Deering McCormick of Special Collections in the Deering Library at Northwestern University."

(In addition to the images in this set, the Library's Siege & Commune Collection contains 1500 caricatures, 68 newspapers in hard-copy and film, hundreds of books and pamphlets and about 1000 posters. Additions are made regularly.)