Old_Patent_Office_Building

The Old Patent Office Building is a historic building in Washington, D.C. that covers an entire city block between F and G Streets and 7th and 9th Streets NW in the Penn Quarter section of Chinatown. Serving as an art gallery for the Smithsonian Institution since the 1960s, it first served as one of the earliest Patent Office buildings (built, 1836–1867 in the Greek Revival style).
The building was home to many U.S. federal government departments, including the first exhibits of the Smithsonian Institution, the structure now houses two Smithsonian museums, the Smithsonian American Art Museum and the National Portrait Gallery.