Patent Office Building (old): Plaques at the Nat'l Portrait Gallery in Washington, D.C.

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Patent Office Building (old): Plaques at the Nat'l Portrait Gallery in Washington, D.C.

The Patent Office Building in Washington, D.C., is a historic Greek Revival structure designed by Robert Mills and completed over 31 years starting in 1836. Originally serving as the U.S. Patent Office, it now houses the National Portrait Gallery and the Smithsonian American Art Museum. The building occupies a full city block in Chinatown and features plaques commemorating its history. It was renamed The Donald W. Reynolds Center for American Art and Portraiture after renovations completed in 2006.