Belphegor, or The Phantom of the Louvre(1965)

Belphegor, or The Phantom of the Louvre is a French supernatural series following a mysterious phantom that haunts the Musée du Louvre after dark. Guards and police prove powerless to capture the elusive creature as it moves through the museum's halls. A curious young man becomes obsessed with unmasking the phantom's identity and uncovering the motives behind its nocturnal activities. Across four episodes, the series blends gothic atmosphere with detective intrigue, exploring the boundary between the supernatural and the rational. Set against the backdrop of one of the world's most iconic museums, the story unfolds as a cat-and-mouse game between the determined investigator and the enigmatic phantom that refuses to be caught.