List of National Historic Landmarks in Washington, D.C.

The District of Columbia, capital of the United States, is home to 78 National Historic Landmarks. The National Historic Landmark program is operated under the auspices of the National Park Service, and recognizes structures, districts, objects, and similar resources according to a list of criteria of national significance.

Source: Wikipedia — List of National Historic Landmarks in Washington, D.C. (CC BY-SA 4.0)