Phantasmagoria
Phantasmagoria (), alternatively fantasmagorie and/or fantasmagoria, was a form of horror theatre that (among other techniques) used one or more magic lanterns to project frightening images – such as skeletons, demons, and ghosts – typically using rear projection onto a semi-transparent screen to keep the lantern out of sight. Mobile or portable projectors were used, allowing the projected image to move and change size on the screen, while multiple projecting devices allowed for quick switching of different images.