The National Historic Landmarks (NHLs) in the U.S. state of Missouri represent Missouri's history from the Lewis and Clark Expedition, through the American Civil War, the Civil Rights Movement, and the Space Age. There are 37 National Historic Landmarks in Missouri. One site in Missouri was once a National Historic Landmark but later had its designation withdrawn when it failed to meet the program's criteria for inclusion. The NHLs are distributed across fifteen of Missouri's 114 counties and one independent city, with a concentration of fifteen landmarks in the state's only independent city, St.