 It was also home to Pennsylvania's first Chick-fil-A restaurant which opened in 1973 and is part of the food court today.In developing the Exton Square Mall, The Rouse Company was responsible for restoring the Zook House, a historic 18th century farmhouse that existed at the site of the mall.By the 1990s, the mall, which had no major renovations, was starting to show its age, leading to plans for expansion.