Conceived in 1853 as a canny real-estate scheme by two young investors expecting to get rich off the idea, Market Square came to be Knoxville's most public spot, a marketplace familiar to every man, woman, and child in the area. By the 1860s, it was the busiest place in a burgeoning city. In a town that became bitterly divided by politics, race, and background, Market Square became a rare common ground: a place to buy all sorts of local produce,...