Frederick Law Olmsted National Historic Site was created on 1979-10-12.
Frederick Douglass National Historic Site was created on 1988-02-12.
National Historic Landmark was created in 1960.
Steamtown National Historic Site was created in 1995.
National Trust for Historic Preservation was created in 1949.
National Register of Historic Places was created in 1966.
Olmsted Brothers was created in 1898.
James A. Garfield National Historic Site was created in 1980.
Fort Scott National Historic Site was created in 1978.
National Historic Trails Interpretive Center was created in 2002.
Bank of Montreal National Historic Site was created in 1894.
Saint-Gaudens National Historic Site was created in 1977.
Christiansted National Historic Site was created on 1952-03-04.