Empire State Building, viewed from an interior courtyard of Peter Cooper Village, September 19, 1951.

City leaders, most notably Robert Moses, also encouraged middle-class, large-scale, master-planned, low-density projects. Stuyvesant Town, developed by the private company Metropolitan Life Insurance, required a massive slum clearance program paid for largely by the city. Located between 14th and 20th streets and First Avenue to Avenue C, the 80-acre site replaced the Gas House district of gas storage tanks. Planned in 1942, the first buildings opened in 1947. The buildings of Stuyvesant Town covered only 26 percent of the site and delivered 302 pp/acre. Stacking up the 8,757 apartments in 15-story buildings failed to overcome the impact of low ground coverage. The all-white residents benefited from generous apartments, private green spaces, and neighborhood retail. Sponsors carefully managed occupancy to prevent crowding. Those families lucky enough to get apartments realized that they had gotten far more than just apartments—they were living in a new, lower density urban landscape that stood apart from the city and was secured by private police. Many would stay for decades.