It's nearly seven feet tall, 3,000 feet long and is made of 160,000 bricks. And it's older than half of the buildings on the University of South Carolina's historic Horseshoe. It's the campus wall, a structure that never succeeded in its original purpose — keeping mischievous 19th century students on campus. But during one tumultuous night in 1865, the wall very likely saved the campus from a fire that consumed one-third of the surrounding city.