# Old Patent Office Building

> U.S. National Historic Landmark building in Washington, D.C., United States

**Wikidata**: [Q2018451](https://www.wikidata.org/wiki/Q2018451)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Old_Patent_Office_Building)  
**Source**: https://4ort.xyz/entity/old-patent-office-building


## References

1. archINFORM
2. DC Historic Sites
3. [SAH Archipedia](https://sah-archipedia.org/buildings/DC-01-DE15.2)
4. National Register of Historic Places
5. National Archives Catalog
6. [SAH Archipedia](https://sah-archipedia.org/buildings/DC-01-DE15)
7. [Source](https://www.archinform.net/service/wd_aipro.php)
8. SAH Archipedia