An execution chamber, or death chamber, is a room or chamber in which capital punishment is carried out. Execution chambers are almost always inside the walls of a maximum-security prison, although not always at the same prison where the death row population is housed. Inside the chamber is the device used to carry out the death sentence. United States In the United States, an execution chamber will usually contain a lethal injection table. In most cases, a witness room is located adjacent to an execution chamber, where witnesses may watch the execution through glass windows. All except for two of the states which allow capital punishment are equipped with a death chamber, but many states rarely put them to use. The exceptions are New Hampshire, which has no execution chamber (although one inmate remains on death row since the abolition of capital punishment in that state is not retroactive) and California, which has no execution chambers after the lethal injection room and gas chamber were removed in 2019. Kansas, Nevada, and Wyoming are the only states to have an execution chamber, which is equipped to execute an inmate by lethal injection, which has never been used, while the states of New Jersey and New York formerly had lethal injection chambers which were never used while the death penalty remained legal. The National Ethics Council of the American Institute of Architects ruled in 2019 that its members may continue to design execution chambers in jurisdictions where they are legal. Locations Notes: Death penalty abolished in 2020. All remaining inmate's death sentences were commuted to life imprisonment by Gov. Jared Polis immediately upon abolition. Death penalty abolished in 2012. All remaining inmates death sentences were commuted to life imprisonment by the Connecticut Supreme Court in 2015. Death penalty abolished in 2011. All condemned prisoners sentences were commuted to life imprisonment by Gov. Pat Quinn immediately upon abolition. Death penalty abolished in 2013. Remaining inmate's death sentences were commuted to life imprisonment by Gov. Martin O'Malley in 2014. Death penalty abolished in 2019; one prisoner remains on death row under sentence of death. Death penalty abolished in 2007. All remaining inmate's death sentences were commuted to life imprisonment by Gov. Jon Corzine immediately upon abolition. Death penalty abolished in 2009. All remaining inmates death sentences were commuted to life imprisonment by the New Mexico Supreme Court in 2019. Death penalty abolished in 2007.