Don Mills, North America's first self-contained suburb, was the earliest planned city to include a full compliment of residential, commercial, educational, medical, religious and industrial facilities. Developed between 1953 and 1965, the ultra modern metropolis had a shopping mall as its commercial core. This depiction from early 1954 shows the retail hub as it was originally envisaged.
Drawing from https://donmills.wordpress.com
A vintage view of the initial DON MILLS mall, which was completed in the fall of 1955. The design of this open-air complex incorporated a minimalist modern architectural style.
Photo from Panda Architectural Photography Collection, Canadian Architectural Archives, University of Calgary / Image number 55943-14
In a second snapshot, we see the east end of the 350-foot central mallway and entrance into the Dominion grocery store. This supermarket would eventually relocate into a larger structure at the mall.
Photo from Panda Architectural Photography Collection, Canadian Architectural Archives, University of Calgary / Image number 55943-18