Greenbelt Knoll, the first racially integrated housing development in Philadelphia and a model for the nation, was built in 1956 by Morris Milgram, a nationally recognized developer and civil rights proponent. Prominent building and landscape architects, including Robert Bishop, Margaret Duncan, and Louis Kahn, created Modernist houses in the natural setting of Pennypack Park. Original residents included Milgram, Rep. Robert N.C. Nix, and Rev. Leon Sullivan.
