French censorship visa # 5 delivered on 8-9-1943.
Finnish censorship visa # 028285.
Original literary source: "Les mystères de Paris", serial novel in 90 parts originally published in the newspaper "Journal des Débats" in Paris, from 19-6-1842 to 15-10-8943.
The film recycles, with slight modifications, the sets of Marcel L'Herbier's "La vie de Bohème".
At the time of shooting, Claudye Carter, who plays La Louve, was Jacques Prévert's partner.