U.S. Capitol building as seen from the tower of the Smithsonian Institution Building, or Castle, with Baltimore and Potomac railroad station and tracks in view, circa 1880, SIA RU000095, SA-197.

Aerial view of the National Mall looking east from the Washington Monument during its first stage of building towards the U.S. Capitol, with the Department of Agriculture building and gardens, the Smithsonian Institution Building, or Castle, and the United States National Museum, now known as the Arts and Industries Building, in view, circa 1881.

Buildings on the National Mall, including temporary government buildings constructed during World War II, now the site of the National Museum of American History, the Department of Labor and Interstate Commerce Commission (ICC) buildings, and the Departmental Auditorium, July 3, 1946.

Demolition of roads on the National Mall during conversion of roadways (Washington and Adams drives) to gravel walkways for pedestrians, October 28, 1975, by Jim Wallace, SIA Acc. 11-009, 75-13713-22.

Tree O'Donnell and Mike Friello of Office of Exhibits Central provide a fiberglass and pigmented polyester resin facial to Uncle Beazley, the 22-foot long replica of a dinosaur triceratops from the NBC production of "The Enormous Egg" located on the Mall in front of the National Museum of Natural History. Uncle Beazley experienced some wear and tear after experiencing fourteen years of children clambering up and down his nose and tail.

Aerial view of National Mall from Washington Monument looking towards U.S. Capitol building, with Baltimore and Potomac Railroad Station and Center Market in view, circa early 1900s.