What landmark designations has the Flatiron Building received?

Detailed answer

The Flatiron Building has received several landmark designations, including its designation as a National Historic Landmark in 1979 and its listing on the National Register of Historic Places. The building is also a designated New York City landmark, and it is protected by the New York City Landmarks Preservation Commission. These designations recognize the building's significance as a pioneering example of skyscraper design and its importance as a cultural and architectural icon of New York City. The landmark designations also help to ensure that the building will be preserved for future generations to enjoy.