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National Portrait Gallery
| NRHP ID: 66000902 |
| NARA ID: 117691853 |
| Wikidata ID: Q2018451 |
| Wikpedia: Old Patent Office Building |
| Historic District: Downtown Historic District |
| Location (in/near): Washington, District of Columbia |
| Listed: 1966-10-15 |
| Role: Building |
| Significance region: National |
| Significance area(s): Architecture; Invention; Science |
| Criteria: A (event); C (architecture/engineering) |
| Architectural style(s): Greek Revival architecture |
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Data from United States Park Service and Wikidata