Window Rock, Arizona in the context of "Navajo Nation"

A National Historic Landmark (NHL) is a building, district, object, site, or structure that is officially recognized by the United States government for its outstanding historical significance. Only some 2,500, or roughly three percent, of over 90,000 places listed on the country's National Register of Historic Places (NRHP) are recognized as National Historic Landmarks.

A National Historic Landmark District may include many contributing properties that are buildings, structures, sites or objects, and it may also include non-contributing properties. Contributing properties may or may not also be separately listed as NHLs or on the NRHP.

Navajo Nation Council Chamber (Navajo: Béésh bąąh dah si'ání) is the center of government for the Navajo Nation. The landmark building, in Window Rock, Arizona, is significant for its association with the 1930s New Deal, and its change in federal policy for relations with Native Americans, as established in the Indian Reorganization Act. With its red sandstone façade and overall rustic architectural style, the chamber was designed to harmonize with its spectacular natural surroundings. The building was declared a National Historic Landmark in 2004. It is "the only legislative headquarters in the United States owned by an American Indian tribe which has been continuously in use by that tribe and whose design incorporates indigenous materials and architectural traditions tied to the Navajo heritage."