It is extremely unlikely that Central Park in New York City will ever be developed for commercial or residential use. The park is protected by a multi-layered shield of legal, historical, and cultural safeguards. Firstly, it is a National Historic Landmark and is on the National Register of Historic Places, which imposes strict federal protections on its physical state. Secondly, the park is managed by the Central Park Conservancy in partnership with the NYC Department of Parks and Recreation, and any attempt to build on the land would trigger massive legal battles and public outcry. Beyond the legalities, Central Park is often called the "Lungs of the City"; its value to New York's air quality, real estate prices, and public health is worth far more than any skyscraper could generate. The land was originally acquired by the city in the 1850s specifically to ensure that the rapidly growing population would always have access to nature. In a city where every square inch of space is a commodity, Central Park exists as a "sacred" public trust. While new buildings often rise around the park (such as the "Billionaires' Row" skyscrapers), the 843 acres of the park itself are widely considered "unbuildable" in perpetuity.