The National Historic Landmarks in Alaska represent Alaska's history from its Russian heritage to its statehood. There are 49 National Historic Landmarks (NHLs) in the state. The United States National Historic Landmark program is operated under the auspices of the National Park Service, and recognizes structures, districts, objects, and similar resources according to a list of criteria of national significance. Major themes include Alaska's ancient cultures, Russian heritage, and role in World War II, but other stories are represented as well. In addition, two sites in Alaska were designated National Historic Landmarks, but the designation was later withdrawn.