The Sanctuary Stone sits on Castle Street in the center of Liverpool. It’s thought to be one of the oldest artifacts related to the beginning of Liverpool. The stone once marked the boundaries for the medieval markets that took place in the town for centuries. Three other similar stones may have also existed on High, Dale, and Water Streets. All would have been a few feet tall originally. Within the marked perimeter, goods could be taken from stalls, as long as they were not carried beyond the boundary stones. If…