John Ruan House
Ruan Mostert House | |
John Ruan House, from the southwest | |
| Location | 4278–4280 Griscom St., Philadelphia, Pennsylvania |
|---|---|
| Coordinates | 40°0′36″N 75°5′28″W / 40.01000°N 75.09111°W |
| Built | 1796 |
| Architectural style | Georgian |
| NRHP reference No. | 85003410 |
| Significant dates | |
| Added to NRHP | October 31, 1985 |
| Designated No parameter | January 3, 1985 |
John Ruan House (1794) is a historic mansion located in the Frankford section of Philadelphia, Pennsylvania, United States. It housed the Grand Army of the Republic Civil War Museum and Library from 1958 to 2021.
The building was added to the National Register of Historic Places in 1985, and to the Philadelphia Register of Historic Places that same year.