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The National Building Museum is a museum of architecture, design, engineering, construction, and urban planning in Washington, D.C., United States. It was created by an Act of Congress in 1980, and is a private non-profit institution. Located at 401 F Street NW, it is adjacent to the National Law Enforcement Officers Memorial and the Judiciary Square Metro station. The museum hosts various temporary exhibits in galleries around the spacious Great Hall.
The building, completed in 1887, served as the Pension Building, housing the United States Pension Bureau, and hosted several presidential inaugural balls. It is an important early large-scale example of Renaissance Revival architecture, and was designated a National Historic Landmark in 1985.