St. Theodosius Cathedral is an Eastern Orthodox church located on Starkweather Avenue in the West Side neighborhood of Tremont in Cleveland, Ohio. Considered one of the finest examples of Russian church architecture in the United States, it is listed on the National Register of Historic Places. St. Theodosius was the first Eastern Orthodox parish in Cleveland and is currently under the jurisdiction of the Diocese of the Midwest of the Orthodox Church in America. The cathedral is perhaps best known for its appearance in the 1978 Best Picture-winning film, The Deer Hunter, with Robert De Niro, Christopher Walken, and Meryl Streep. It is also seen in the opening credits of Major League.

Tremont is a neighborhood on the West Side of Cleveland, Ohio. Listed on the National Register of Historic Places, the district sits just south of the Ohio City neighborhood. It is bounded by the Cuyahoga Valley to the north and east, MetroHealth medical center to the south, and West 25th Street and Columbus Road to the west.