Between 1872 and 1973, the Idaho State Penitentiary housed over 13,000 inmates. Some of Idaho's most corrupt and cunning criminals resided behind these Boise sandstone walls. Constructed in large part by inmate labor, the "Old Idaho Penitentiary" stands as a reminder of Idaho's Wild West past. Horse thieves, moonshiners, bank robbers, and assassins alike all called this penitentiary home. Owned and operated by the Idaho State Historical Society, the Old Idaho Penitentiary is one of only four territorial prisons open to the public in the United States.