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National Historic Landmarks (NHL) are buildings, districts, objects, sites, and structures, that are within the United States, or its territories and associated states, or foreign states; and designated by the United States Secretary of the Interior because they meet one or more of the following:

  • sites where events of national historical significance occurred;
  • places where prominent Americans lived or worked;
  • icons of ideals that shaped the nation;
  • outstanding examples of design or construction;
  • places characterizing a way of life; or
  • archaeological sites able to yield information.

All NHLs are also listed on the National Register of Historic Places (NRHP), but most NRHP properties are not designated NHLs.

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