Stuyvesant Town–Peter Cooper Village is a sprawling post-World War II residential complex on the east side of Manhattan, comprising 110 red-brick apartment buildings on 80 acres between 14th and 23rd Streets from First Avenue to Avenue C, collectively housing 11,250 apartments. Planned beginning in 1942 and opened in 1947 on the site of the old Gas House District, it was one of the largest middle-class housing developments ever built in the United States and remains a dominant residential landmark on the Lower East Side's edge.