Stonegate Penitentiary

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Real Identity: Not Applicable
Appearances (BTAS): Pretty Poison, Birds Of A Feather, I Am The Night, The Man Who Killed Batman, Bane, Second Chance, Deep Freeze, Over The Edge, and Mystery Of The Batwoman
Appearances (GG): Jailhouse Wreck
Appearances (JL): A Better World Part Two
Powers: Not Applicable
Voiced By: Not Applicable

Gotham Penitentiary was part of Harvey Dent's vision for a cleaner and safer Gotham City. It appears to also be a practical solution to cut down on the cost of transporting criminals to Levitz Prison upstate. Funded in part by Wayne Enterprises, Bruce Wayne and Dent broke ground for the facility on a small island in Gotham Bay. During the formal ceremony, Pamela Isley extracted one wild thorn rose. The rest of the patch were destroyed during construction and thought to have gone extinct. It was later re-named Stonegate Penitentiary. Unlike Arkham Asylum, Stonegate is where criminals who are not deemed insane such as various henchmen, mobsters, and mafia bosses are incarcerated when they are captured. However, due to overcrowding issues several criminals have served time in both Arkham Asylum and Stonegate Prison.

Five years later, Stonegate is the first structure to greet boats as they enter Gotham Harbor. Some notable inhabitants were Poison Ivy, Spider Conway, Jazzman, Penguin, and Mr. Freeze in Prison Cell 7021059, where it was refrigerated. Likewise, a number of daring escapes have happened from a helicopter diving into prison grounds to extract a criminal to mundane ones through hiding in a laundry cart. The Penguin is allowed to care for a flock of pigeons during his sentences. The most bizarre event was when a giant M-9 robot, marched through the electrified perimeter fence, broke into Stonegate grounds, and kidnapped Mr. Freeze from his prison cell. While investigating a break-in at the Gotham City Police Department's Dangerous Evidence Vault, Batgirl concluded Harley Quinn, Poison ivy, and Catwoman were innocent of the crime and broke them out of Stonegate.

In the Justice Lords universe, Batman imprisoned the Justice League in uninhabitated Stonegate Penitentiary within custom cells armed with mercury switches to detect any movement. Superman's was also outfitted with red spectrum radiation to strip him of his powers. With Batman unable to outsmart Batman, the Flash sped up his heartrate to make it appear he was flatlining. Batman fell for the ruse and freed Flash to examine his body. The Flash knocked out Batman and freed his allies. While Batman went to the Batcave, the rest of the League searched Stonegate's computers for possible hospitals that Hawkgirl would be kept. Green Lantern realized Arkham Asylum was the location and they vacated the prison.