| St. Mary's Catholic Church | |
| Location: | 4th St. and 3rd Ave. Medora, North Dakota |
| Coordinates: | 46.9144°N -103.5222°W |
| Built: | 1884 |
| Builder: | Peter Book |
| Added: | December 2, 1977 |
| Area: | less than one acre |
| Refnum: | 77001017 |
The St. Mary's Catholic Church in Medora, North Dakota was built in 1884 by Peter Book, a builder who also constructed the Von Hoffman House. It was listed on the National Register of Historic Places in 1977.
A metal plate on the church states that it was built by the Marquise de Mores. She was the wife of the Marquis de Mores.[1]