Koenigsmark is a 1935 British-French drama film directed by Maurice Tourneur and starring Elissa Landi, John Lodge and Pierre Fresnay. The film is based on the novel Koenigsmark by Pierre Benoît. It's sets were designed by the art director Lucien Aguettand. The film was known in the United States as Crimson Dynasty.

During the First World War, before joining a squadron at the front in 1918, Herbillon (Jean-Pierre Aumont) has a liaison with Helene (Annabella), a married woman. The young man discovers that his mistress is none other than the wife of Maury (Charles Vanel), an aviator friend.

Annabella, Jean Gabin and Fernand Gravey star as a trio of circus trapeze artists. Both Gabin and Gravey love Annabella, but she has eyes only for Gravey. Seething with jealousy, Gabin plots revenge against his rival. He "accidentally" drops Gravey into a net during rehearsal -- but does he plan to do the same during a performance, when the trio works without a net?

In the eyes of his wife, whom he is cheating on with an actress, Count Adrien passes himself off as the famous mask racer who has won countless car races. Chance forces him to really run and he is replaced by a drunken mechanic who wins. The mechanic uses blackmail and takes the count's place with his wife and his mistress.

Because Colin has a charming smile, he seduces his boss, a great decorator. And Colin, who ruined himself to approach the young woman, succeeds in becoming her partner and then her husband.