Mount Rushmore National Memorial is a monumental granite sculpture created by Gutzon Borglum. It is located near Keystone, South Dakota. This monument represents the first 150 years of the history of the United States. Before the carving of this sculpture, the area was known by the Sioux as "Six Grandfathers". It is estimated that about 2 million people visit the memorial annually. The sculpture shows the faces of four American presidents: George Washington, Thomas Jefferson, Theodore Roosevelt and Abraham Linlcon. These presidents were elected by the sculptor because all of them wanted to preserve the Republic and at the same time expand its territory. This monument was started in 1927 and ended in 1941.
