Portland's Maine Mall 

MAINE MALL was the fourth mall-type shopping center in the Pine Tree State. It was officially dedicated in August 1971. At that time, there were twenty-one stores and services. Eventually, there  would be a total of sixty-two charter stores.
Photo from Portland Public Library Archives

One of these was a Boston-based Jordan Marsh. It had opened, as  a freestanding location, in August 1969. The store became known for its upscale Rocky Coast Restaurant. 

The original MAINE MALL included an in-mall IGA Gold Star supermarket. It was dedicated in September 1971.

Drawing from Leatherbee & Company