I'm currently writing a paper about the history of shopping centers before the rise of the shopping mall (to complement the paper I wrote about history of shopping malls three years ago). One of the major experts on this topic is George Washington University professor Richard Longstreth, who uses this drawing of a proposed shopping center in 1954 for his article "The Diffusion of the Community Shopping Center Concept During the Interwar Decades."
Look familiar? That's the Langley Park Shopping Center, located at New Hampshire Avenue and University Boulevard, while on the drawing board. At the time, Langley Park was a new, if modest, neighborhood at what was still the edge of suburban Montgomery and Prince George's counties. The shopping center was designed by architects Abbott, Merkt & Company, then a nationally-renowned firm in the field of shopping center design.
Here's a bird's-eye view of the shopping center today from Bing Maps: