P.J.C. Janssen, better known as Jules Janssen, holds a unique place in the history of film and physical media as a pioneering director of early motion pictures. His most notable work, *The Photographical Congress Arrives in Lyon* (1895), is a significant piece in the evolution of cinema, showcasing the innovative use of chronophotography he developed. This groundbreaking film not only captures a key moment in film history but also serves as a testament to the technological advancements of the era, making it highly sought after by collectors. Collectors prize Janssen's work for its historical significance and rarity, particularly as early cinematic releases become increasingly difficult to find in pristine condition. His contributions to the medium—blending science and art—have cemented his legacy, making his films valuable artifacts for those passionate about the origins of filmmaking. As physical media enthusiasts continue to explore the roots of cinema, Janssen's work remains a cornerstone of any serious collection.