Martin Hartwig is a revered figure in the realm of physical media, best known for his groundbreaking work as a director during the silent film era. His most notable film, *What Belongs to Darkness* (1922), is a haunting exploration of existential themes that has captivated audiences for generations. This film is particularly sought after by collectors due to its innovative cinematography and the way it pushed the boundaries of storytelling at the time. Hartwig's unique vision and ability to blend atmospheric visuals with profound narratives have made his films a prized addition to any serious collection. Collectors often seek out rare releases of *What Belongs to Darkness*, especially those that feature restored prints or special editions, as these versions highlight the film's artistic merits and historical significance. Hartwig's contributions to cinema not only shaped early filmmaking but also established a lasting legacy that continues to resonate with film enthusiasts and collectors alike.