Libby Prison War Museum Chicago 1893 Medal; 1893, Columbian World's Fair Libby Prison Exhibit Medal. Copper-plated-White metal, 68 mm, 181.8 gm. Eglit-477. The prison was dismantled and rebuilt by Charles F. Gunther on the grounds of the Columbian World's Fair in Chicago. Obv: Libby Prison War Museum Chicago. Rx: Statistics about Southern prison for Union troops during the Civil War. Beautiful dark patina.