More than 1,000 articles provide comprehensive information about Satanism, demonology, and witchcraft throughout history and in the present day. Concepts of the devil and hell, as well as beliefs in demons and angels from various cultural backgrounds, are explained, with a focus on Europe. Modern Satanism is also given significant attention, including keywords related to Alister Crowley, the Ordo Templi Orientis (O.T.O.), the Fraternitas Saturni, the Church of Satan, and the Temple of Seth, as well as new German groups such as the Black Order of Lucifer, youth Satanism, and the Satanic murders in Sonderhausen and Witten. Witchcraft, which was connected to Satanism on one hand but also developed from the belief in nature spirits, is described up to its modern representatives like the Wicca cult. Witch trials and the Inquisition are also addressed.