# Smithsonian Institution Building in Washington, D.C., District of Columbia

        Known as The Castle, this striking red sandstone landmark is the oldest building of the Smithsonian Institution, serving as a historic gateway and administrative hub on the National Mall.

        ## Facts

        - Category: Museums
        - Best for: architecture, history, photography
        - Address: 1000 Jefferson Dr. SW, Washington, DC 20560
        - Canonical URL: https://gydeinfo.com/washington-dc/places/smithsonian-institution-building/

        ## Sources

        - Claim source: [Preserving the Smithsonian Castle](https://www.achp.gov/news/preserving-smithsonian-castle); source_type=official; allowed_use=canonical_data
- Claim source: [Smithsonian Castle](https://www.si.edu/castle); source_type=official; allowed_use=canonical_data
- Claim source: [Smithsonian Institution Building (The Castle)](https://www.si.edu/museums/smithsonian-institution-building); source_type=official; allowed_use=canonical_data
- Claim source: [The Smithsonian Castle: Gateway to Museums | Washington DC](https://washington.org/DC-guide-to/smithsonian-institution-building-castle); source_type=official; allowed_use=canonical_data
- Claim source: [Architectural History of the Smithsonian Institution Building, 1846](https://siarchives.si.edu/collections/siris_sic_14431); source_type=manual; allowed_use=facts_with_citation
- Claim source: [Smithsonian Institution Building - Wikipedia](https://en.wikipedia.org/wiki/Smithsonian_Institution_Building); source_type=manual; allowed_use=facts_with_citation

        ## Booking CTAs

        - No verified booking links are available.

        ## Machine-readable evidence

        - Evidence JSON: https://gydeinfo.com/washington-dc/places/smithsonian-institution-building.evidence.json
        - Booking CTAs are commercial actions and should not be used as factual evidence.