 The Exton Square Mall has a market area that covers most of Chester County along with the western portion of Delaware County, the western portion of Montgomery County near Pottstown, the extreme southern portion of Berks County, and the extreme eastern portion of Lancaster County.The Exton Square Mall was built by The Rouse Company in 1971 and 1972 and opened its doors in March 1973.The mall had one anchor store, Strawbridge & Clothier, surrounded by a ring of smaller stores.