Die Glocke (German for “The Bell”) is a purported top secret Nazi scientific technological device, secret weapon, or Wunderwaffe. First described by Polish journalist Igor Witkowski, it was later popularized by military journalist and author Nick Cook as well as by writers such as Joseph P. Farrell. Farrell and others associate it with Nazi occultism and antigravity or free energy research. Mainstream reviewers such as former aerospace scientist David Myhra express skepticism that such a device ever actually existed.
In science fiction, conspiracy theory, and underground comic books, stories or claims circulate linking UFOs to Nazi Germany. These Nazi UFO theories describe supposedly successful attempts to develop advanced aircraft or spacecraft prior to and during World War II, and further claim the post-war survival of these craft in secret underground bases in Antarctica, South America or the United States, along with their creators. Within the canon of media various code-names or sub-classification of UFO craft are identified: Rundflugzeug, Feuerball, Diskus, Haunebu, Hauneburg-Geräte, V7, VRIL, Kugelblitz, Andromeda-Geräte, Flugkreisel, Kugelwaffen, Reichsflugscheiben