The New York Studio School’s Whitney Studio in Greenwich Village has been designated a “National Treasure” by the National Trust for Historic Preservation, according to an announcement from the organization today. The building was constructed in 1877 as a carriage house but was converted by art patron Getrude Vanderbilt Whitney in 1907 into a studio and salon.

The Whitney Studio’s ornate interior was designed by Robert Winthrop Chanler, whom Whitney commissioned in 1918. Today, the structure and its decorative elements are badly in need of repair and restoration, with the New York Studio School estimating the cost of the project at $2.2 million.