Films that survive according to the American Silent Feature Film Survival Database and other sources (mostly the websites of many different film archives), but that no one on Letterboxd has seen (and many haven't been rated on IMDB either).
Incomplete films are included, but films where only a short fragment survive are not (if film archive lists how much of the film exists). Films with synchronized sound are included, but films with spoken dialogue are not. Films may exist in any form (ex. digital, print, negative, etc.).
Ten films have been removed by being seen so far. See notes for how much and where each film has been preserved.