Washington, D.C., commonly referred to as D.C., is the Federal Capital of the United States of America. As such, this city contains an incredible array of attractions that aren't found elsewhere in the country. Among the attractions are a series of memorials and monuments, such as the Vietnam Veterans Memorial, the Lincoln Memorial and the Washington Monument. While the Smithsonian Institution has programs and facilities throughout the nation, Washington is where 16 of its museums and the National Zoo are located, displaying less than two percent of the 142 million artifacts the institute owns. National museums in D.C. include the National Air and Space Museum, the National Building Museum, the National Gallery of Art and the National Postal Museum, to name but a few. Other prominent sights while in the Capital are the cornerstones of the U.S. Government: the United States Capitol, the United States Supreme Court and the White House, home of the President of the United States.