Smithsonian American Art Museum Landmark located in Washington, D.C.'s downtown cultural district. It is considered an example of Greek Revival architecture in the United States. It was designed by architects Robert Mills, and Thomas U. Walter. During the 1990s, the Smithsonian Institution worked on restoring the building. The Smithsonian completed another renovation of the building in July 1, 2006. The 2000-2006 renovation restored many of the building’s exceptional architectural features: restoring the porticos modeled after the Parthenon in Athens, a curving double staircase, colonnades, vaulted galleries, large windows, and skylights as long as a city block. During the renovation, the Lunder Conservation Center, the
Smithsonian Institution the first atomic bomb used in World War II. The American Legion and Air Force Association believed the exhibit put forward only one side of the debate over the atomic bombings of Hiroshima and Nagasaki, and that it emphasized the effect on victims without discussing its use within the overall context of the war. The Smithsonian changed the exhibit, displaying the aircraft only with associated technical data and without discussion of its historic role in the war. In 2003, a National Museum of Natural History exhibit, Subhankar Banerjee's "Seasons of Life and Land", featuring photographs of the Arctic National Wildlife