Arkham Asylum is a prison for mentally criminals in the Batman series, and it is one of the most notable places in Gotham City.
The Asylum's most notables patients are the Joker, Scarecrow, Two-Face and Poison Ivy. It also fitted for criminals with medical needs outside of ordinary prisons such as Mr. Freeze.
Originally, Arkham Asylum is used only to house genuinely mentally unwell patients having no connection to Batman, but over the course of the 1980s, a trend was established of having the majority of Batman's supervillain opponents end up at Arkham.
Arkham Asylum appeared in the FOX series Gotham, and it was closed for 15 years prior to the series' events.
After the death and disgrace of Theo Galavan, Hugo Strange who was in charge of the Asylum started his experiment in Indian Hill facility under the asylum owned secretly by Wayne Enterprises that was controlled by the Court of Owls., and the facility is a secret prison for many experiments that were brought back to life and became savage monsters or supervillains, most notably Theo Galavan who revived as Azreal, Victor Fries who revived as Mr. Freeze and Bridgit Pike who became Firefly. So far, the only experiment that had intact memories is Fish Mooney.
Notable patients (in New Earth comics)
- Amadeus Arkham (also its founder)
- The Joker
- Pamela Lillian Isley / Poison Ivy
- Edward Nygma / The Riddler
- Harleen Quinzel / Harley Quinn
- Harvey Dent / Two-Face
- Hugo Strange
- Waylon Jones / Killer Croc
- Garfield Lynn / Firefly
- Maxie Zeus
- Margaret Pye / Magpie
- Selina Kyle / Catwoman
- Lazlo Valentin / Professor Pyg
- Jervis Tetch / Mad Hatter
- Roman Sionis / Black Mask
- Matt Hagen, Preston Payne & Sondra Fuller / Clayfaces
- Arnold Wesker / Ventriloquist
- Drury Walker / Killer Moth
- Victor Zassz
- Jeremiah Arkham
- Oswald Cobblepot / Penguin
- Victor Fries / Mr. Freeze
- Johnathan Crane / Scarecrow
- Alberto Falcone / The Holiday
- Warren White / Great White Shark
- Julian Day / Calendar Man