The John W. Anderson slave pen was found in 1999 on a farm in Germantown, Kentucky. This "human warehouse" was used to hold 50-70 slaves in the process of being sold at the Natchez, Mississippi, slave market from 1830-1834. The building was partially preserved because of its use as a frame for a tobacco curing barn on the farm. The log structure was dismantled and reconstructed as the centerpiece of the National Underground Railroad Freedom Center in 2004.