Title: Castle Films
Content:  Castle Films was a film company founded in California by former newsreel cameraman Eugene W. Castle (1897–1960) in 1924. Originally, Castle Films produced industrial and advertising films. Then in 1937, the company pioneered the production and distribution of 8mm and 16mm films for home projection. It became a subsidiary of Universal Pictures and was eventually renamed Universal 8 from 1977 before folding in the early 1980s due to competition from home video.
Title: The Castle (1994 film)
Content:  The Castle (Замок) is a 1994 film directed by Aleksei Balabanov. It is the second notable screen version of Kafka’s unfinished novel The Castle. It tells of an individual desperately trying to preserve his identity while struggling against sinister and invisible bureaucrats who rule the village from inside the titular castle. The picture is noted for costumes/sets design in bruegelian style, it won Best Art Direction and Best Costumes at the 1994 Nika Awards.
Title: We Have Always Lived in the Castle (film)
Content:  The film, the first screen adaptation of Shirley Jackson's novel of the same name, was originally reported to be in development in August 2009, when Michael Douglas's production company Further Films announced its attachment to the project written by Mark Kruger. Jackson's eldest son, Laurence Hyman, was also reported to be producing in some capacity. In August 2016, Stacie Passon was reported to be directing the film, with Jared Ian Goldman and Robert Mitas producing, and Douglas and Robert Halmi Jr. serving as executive producers.
Title: The Castle (1968 film)
Content:  The Castle (Das Schloß) is a 1968 West German film directed by Rudolf Noelte and starring Maximilian Schell, Cordula Trantow, Trudik Daniel and Helmut Qualtinger. It is based on the 1926 eponymous novel by Franz Kafka. The film won two German Film Awards. It was chosen as West Germany's official submission to the 44th Academy Awards for Best Foreign Language Film, but did not manage to receive a nomination. It was also listed to compete at the 1968 Cannes Film Festival, but the festival was cancelled due to the events of May 1968 in France. The film's sets were designed by the art director Hertha Hareiter.
Title: Ted Castle (photographer)
Content:  Castle was stills photographer on Hollwood productions Man on a Tightrope (dir. Elia Kazan, 1953) filmed in Bavaria, and Oklahoma! (1955).
Title: Castle Freak
Content:  On April 15, 2018, it was announced that Cinestate and Charles Band would be producing a remake/reboot of Castle Freak, along with the film's original star Barbara Crampton also producing and special effects artist Tate Steinsiek set to direct. The movie was initially intended to release at the Chattanooga Film Festival on April 16, 2020, but instead debuted on video-on-demand on December 4, 2020.
Title: Castle of Evil
Content:  Castle of Evil was produced by United Pictures Corporation and National Telefilm Associates. The film's working title was The Haunting of Castle Montego. Principle photography began on 11 November 1965 at Producers Studio in Los Angeles. United Picture Corporation's first films, Castle of Evil and Destination Inner Space, were shot back to back in 14 days. Director Francis D. Lyon said, "I don't recommend this hurried approach as a practice, because quality has to suffer."
Title: Castle Freak (2020 film)
Content:  On April 15, 2018, it was announced that Cinestate and Charles Band would be producing a remake/reboot of Castle Freak, along with the film's original star Barbara Crampton also producing and special effects artist Tate Steinsiek set to direct. Announcing his involvement with the project on Instagram, Steinsiek wrote, "It's such an honor to be taking not only a Stuart Gordon classic but also embracing the world of Lovecraft." Crampton later announced that the film would feature an "Expanded Lovecraft Universe", with some elements from the first film, while introducing many new characters.
Title: William Castle
Content:  William Castle (born William Schloss Jr.; April 24, 1914 – May 31, 1977) was an American film director, producer, screenwriter, and actor. Orphaned at 11, Castle dropped out of high school at 15 to work in the theater. He came to the attention of Columbia Pictures for his talent for promotion and was hired. He learned the trade of filmmaking and became a director, acquiring a reputation for the ability to churn out competent B-movies quickly and on budget. He eventually struck out on his own, producing and directing thrillers, which, despite their low budgets, he effectively promoted using gimmicks, a trademark for which he is best known. He was also the producer for Rosemary's Baby.
Title: The Castle (radio series)
Content:  The Castle is a BBC Radio 4 comedy set in the Middle Ages and referencing modern life: in the words of its own introduction, "a comedy set in the filth, grime, stench and brutality of the Middle Ages, with some nice music". The exact timeframe of the series is not fixed; one episode specifies it to be in the early 12th century, yet another references Joan Of Arc. It is written by Kim Fuller and, from series 2, Paul Alexander with additional dialogue by Nick Doody, Matt Kirshen and Paul Dornan. It was first broadcast on 7 September 2007, at 11.30am, and a second series began on Friday 2 January 2009 in the same time slot. Series 3 debuted on Wednesday 14 July 2010. Series 4 began its broadcast in 2012. All four series were produced by David Tyler (producer) for Pozzitive Television.

Question: Who was the producer of The Castle?
Answer: Maximilian Schell.