Ravencroft
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In Marvel Comics, the Ravencroft Institute is a maximum security prison for the criminally insane, not unlike Arkham Asylum of the Batman comic books. Many insane murderers and supervillains, such as Carnage and Venom, have been kept at Ravencroft. The institute was first mentioned in Web of Spider-Man #112, written by Terry Kavanagh. The institute officially opens in Web of Spider-Man Annual #10 (1994), written by Terry Kavanagh, with art by Jerry Bingham.
Dr. Ashley Kafka was the founder and first director of Ravencroft. John Jameson was head of security. Both get fired in Spectacular Spider-Man #246, and Dr. Leonard Samson becomes Ravencroft's new director. The institute hasn't appeared since and in Leonard Samson's recent appearances, he owns a private practice.