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
Independent Administrative Institution National Museum administrative efficiencies in the work of achieving the range of inter-related preservation, conservation, and education goals of each unique institution. In 2007, the perceived successes of the IAI National Museum experiment led to a further consolidation. The Independent Administrative Institution National Institutes for Cultural Heritage was established by merging two Independent Administrative Institutions—the National Museum, which comprised the Tokyo National Museum, the Kyoto National Museum, the Nara National Museum and the Kyushu National Museum—and the Independent Administrative Institution National Research Institute for Cultural Properties, which consisted of the National Research Institute for Cultural Properties, Tokyo and the National Research Institute