The Sentinel is a 1977 American supernatural horror film directed by Michael Winner, and starring Cristina Raines, Chris Sarandon, Ava Gardner, Burgess Meredith, Sylvia Miles and Eli Wallach. The plot focuses on a young model who moves into a historic Brooklyn brownstone that has been sectioned into apartments, only to find that the building is owned by the Catholic diocese and is a gateway to Hell. It is based on the 1974 novel of the same name by Jeffrey Konvitz, who also co-wrote the screenplay with director Winner. It also features Christopher Walken, Jeff Goldblum, John Carradine, Jerry Orbach, Tom Berenger, Nana Visitor and Beverly D'Angelo in supporting roles.

Robert Michael Winner was a British filmmaker, writer, and media personality. He is known for directing numerous action, thriller, and black comedy films in the 1960s, 1970s and 1980s, including several collaborations with actors Oliver Reed and Charles Bronson.