The state legislature established a state prison system in 1848 and selected Huntsville as the site. The first prisoners, a cattle thief, a murderer, and a horse thief, arrived on October 1, 1849. The nickname “Walls Unit,” synonymous in Texas with death row, is derived from the red brick walls of the two-story buildings added by Heiner, who was noted for his design of county jails in addition to his courthouses. Enclosing walls and guard towers are also red brick, making a forbidding, monotone appearance.
In the jail’s early years, when inmates were required to work to lessen the burden on taxpayers, a cotton and woolen mill was installed on the prison grounds in 1853. During the Civil War, prisoners made fabric for tents and uniforms for the Confederacy. A convict lease system operated from 1866 to 1910 for prisoner work in the private sector.
Administrative headquarters for the Texas Prison System is in Huntsville, along with the death chamber. Execution was by hanging at county jails until 1923, after which all executions were conducted by the state in Huntsville and the method changed to the electric chair and later to lethal injection.