Not part of the SI..........you have to pay.........aliens???

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National Building Museum

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Museum in Washington, D.C.

The National Building Museum is located at 401 F Street NW in Washington, D.C., United States. It is a museum of "architecture, design, engineering, construction, and urban planning". Wikipedia

Address: 401 F St NW, Washington, DC 20001

Opened: 1887

Hours:

Open ⋅ Closes 5PM

Architectural styles: Renaissance architecture, Renaissance Revival architecture

Architect: Montgomery C. Meigs