In December 2015, a 2.2 square mile area of retail stores surrounding (and including) DAYTON MALL was officially designated as the Miami Crossing District.
Graphic from http://miamicrossingdistrict.com 

In a contemporary aerial view, J.C. Penney is at front center of the image. Sears would have been on the left.
Photo from http://washingtonprime.com (Washington Prime Group)

We wrap up our DAYTON MALL salute with a circa-2019 site plan. As the shopping hub's 50th anniversary approaches, the complex is saddled with vacant anchor spaces on its east and west ends. Still, the 1,442,600 square foot buying behemoth features over one hundred and seventy stores and services.