Levittown, New York's South Village Green. Levitt & Sons strived to provide everything that the "Levittowner" would need, but fell short in regard to shopping options. Their Village Greens had just a few small shops. This oversight was quickly exploited by two other developers, who built LEVITTOWN CENTER, a 270,800 square foot strip complex. The Levitts had learned a lesson. They would build large, regional shopping centers as part of their next two planned cities.
Photo from http://www.longislandmemories.org

A site plan of the completed LEVITTOWN CENTER, circa-1956. The complex consisted of a single level of retail, with some stores having basement sales areas. The J.W. May's anchor, on the right, also included an upper level. Over the years, the complex would house three supermarkets...the A & P indicated here, a Grand Union and May's Food Center.