Preserving historic properties as important reflections of our American heritage became a national policy through the passage of the Antiquities Act of 1906, the Historic Sites Act of 1935, and the National Historic Preservation Act of 1966. The National Register of Historic Places is the official list of these recognized properties and is maintained and expanded by the National Park Service.
This publication explains how the National Park Service applies the National Register of Historic Places criteria in evaluating the wide range of properties that may be significant in local, State, and national history.