Phantasmagoria

Phantasmagoria (American pronunciation^ⓘ), 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. In many shows, the use of spooky decoration, total darkness, (auto-)suggestive verbal presentation, and sound effects were also key elements. Some shows added a variety of sensory stimulation, including smells, smoke and electric shocks. Elements like required fasting, fatigue (late shows), and drugs have been mentioned as methods of making sure spectators would be more convinced by what they saw. The shows started under the guise of actual séances in Germany in the late 18th century and gained popularity through most of Europe (including Britain) throughout the 19th century.

The word "phantasmagoria" has also been commonly used to indicate changing successions or combinations of fantastic, bizarre, or imagined imagery.

From French phantasmagorie, from Ancient Greek φάντασμα (phántasma, “ghost”) + possibly either αγορά (agorá, “assembly, gathering”) + the suffix -ia, or ἀγορεύω (agoreúō, “to speak publicly”).

Paul Philidor (also known simply as "Phylidor") announced his show of ghost apparitions and evocation of the shadows of famous people as Phantasmagorie in the Parisian periodical Affiches, annonces et avis divers of December 16, 1792. About two weeks earlier the term had been the title of a letter by a certain "A.L.M.", published in Magazin Encyclopédique. The letter also promoted Phylidor's show. Phylidor had previously advertised his show as Phantasmorasi in Vienna in March 1790.

The English variation Phantasmagoria was introduced as the title of M. De Philipsthal's show of optical illusions and mechanical pieces of art in London in 1801. De Philipsthal and Philidor are believed to have been the same person.

Some ancient sightings of gods and spirits are thought to have been conjured up by means of (concave) mirrors, camera obscura, or magic lantern projections. By the 16th century, necromantic ceremonies and the conjuring of ghostly apparitions by charlatan "magicians" and "witches" seemed commonplace.

In the 1589 version of Magia Naturalis, Giambattista della Porta described how to scare people with a projected image. A picture of anything that would terrify the beholder should be placed in front of a camera obscura hole, with several torches around it. The image should be projected onto a sheet hanging in the middle of the nascent dark chamber, where spectators would not notice the sheet but only see the projected image hanging in the air.

In his 1613 book Opticorum Libri Sex, Belgian Jesuit mathematician, physicist and architect François d'Aguilon described how some charlatans cheated people out of their money by claiming they knew necromancy and would raise the specters of the devil from hell and show these to the audience inside a dark room. The image of an assistant with a devil's mask was projected through a lens into the dark room, scaring the uneducated spectators.