Huntsville Unit

Texas State Penitentiary at Huntsville or Huntsville Unit, nicknamed "Walls Unit", is a Texas state prison located in Huntsville, Texas, United States. The approximately 54.36-acre facility, near Downtown Huntsville, is operated by the Correctional Institutions Division of the Texas Department of Criminal Justice, administered as within Region I. The facility, the oldest Texas state prison, opened in 1849.The unit houses the execution chamber of the State of Texas. It is the most active execution chamber in the United States, with 573 executions since 1982, when the death penalty was reinstated in Texas.