sentences:  New York City's right to limit owners' ability to convert landmarked buildings was upheld by the U.S. Supreme Court in 1978.Many of the NYC NHLs are listed, either individually or as part of historic districts, in the List of New York City Designated Landmarks.There are nine National Monuments, National Memorials or National Historic Sites in New York City (all but the Statue of Liberty are also National Historic Landmarks)