The original building, which was opened in 1981,[1] is operated by the State Historical Society of North Dakota and features permanent and temporary exhibits.
In June 2008, the museum, which has been called a "Smithsonian on the plains",[2] became home to a rare mummified Edmontosaurus with fossilized skin.
[3] Expansion[4] of the North Dakota Heritage Center & State Museum finished with a grand opening on November 2, 2014, coinciding with the 125th anniversary of statehood.
[5] The expansion added 127,000 square feet of collections storage, labs, and office space, doubling the total size of the museum.
[9] The State Archives manages storage and preservation for books, periodicals, maps, photographs, manuscripts, newspapers, oral histories and film.