Image #1 "Patent Office Building," 1846 Dauguerreotype by John Plumbwe Jr. Library of Congress
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Image #2 "Patent Office Building," about 1857 Chromolithograph by Edward Sachse & Co. National Portrait Gallery Smithsonian Institution
Image #3 "Patent Office, Washington D.C.," 1861 Albumen silver print by Bierstadt Brothers National Portrait Gallery Smithsonian Institution
Image #4 "Soldier's sleeping bunks," 1861 Hand-colored illustration from "Harper's Weekly," June 1, 1861 National Portrait Gallery Smithsonian Institution
Image #5 "Lincoln's inaugural ball," March 6, 1865 Illustration from "Illustrated London News," April 8, 1865 National Portrait Gallery Smithsonian Institution
Image #6 "Bill of fare for the ball," 1865 Library of Congress
Image #7 "South Hall foyer" or "Great Hall," about 1887 Photograph of drawing by Cluss & Schulze Architects: Office of Architectural History and Historic Preservation, Smithsonian Institution
Image #8 "West Wing," 1900s
Image #9 "Great Hall," late 19th century
Image #10 Civil Services offices, 1950s Smithsonian American Art Museum
