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Existing comment: National Historic Sites
Number of Parks: 78 (as of 2015)
First Park: Salem Maritime National Historic Site | 1938
Newest Park: William Jefferson Clinton Birthplace Home NHS | 2010

National Historic Sites interpret a single theme or event in a relatively compact area. Many, but not all, are devoted to a person, marking their birthplace or adult home. The National Park Service manages most National Historic Sites, which may be designated as such either by Congress or by the secretary of the interior.
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