What preservation efforts have been made to protect the Flatiron Building?

Detailed answer

The Flatiron Building has been the subject of several preservation efforts over the years, including its designation as a National Historic Landmark in 1979 and its listing on the National Register of Historic Places. In the 1990s, the building underwent a major restoration project, which involved the repair and replacement of its exterior facade, as well as the restoration of its historic interior spaces. The building is also protected by the New York City Landmarks Preservation Commission, which ensures that any future alterations or renovations will be subject to strict review and approval.