source: Danville Gazette (Danville, Indiana) - issue of Thursday, July 20, 1950 - page 1, columns 2-3:
The IGA supermarket in Danville may be remembered for its location at 1120 West Main Street, which is at the northeast corner of the intersection of US 36 (West Main Street) and County Road 75 West (aka Mackey Road) on the west side of town. However, back in July 1950, it actually opened on the south side of the courthouse square, at 59 West Marion Street. Back then, Marion Saunders was the owner, and it was known as Saunders' IGA Market. In 1950, it took over half of the remodeled Hoosier Hotel building. The article about its July 1950 grand opening touted the fact that the store would be open 7 days a week and offer "complete self-service", with 2 "high-speed checkout counters capable of servicing 2,000 customers per day".
So at one time in the 1950's, there was a Kroger on the west side of the courthouse square, and an IGA supermarket on the south side of the courthouse square.