The Danger Room is a fictional training facility[1] appearing in American comic books published by Marvel Comics. It first appeared in The X-Men #1 (September 1963) and was created by Stan Lee and Jack Kirby. The facility is depicted as built for the X-Men as part of the various incarnations of the X-Mansion. Its primary purpose is to train the X-Men, initially using traps, projectile firing devices, flamethrowers, and mechanical dangers such as presses and collapsing walls. These were replaced by holographics, when the Danger Room was rebuilt using Shi'ar technology. It gained sentience in Astonishing X-Men as Danger.