Peter Howard Gilmore is an American author and administrator of the Church of Satan. He was appointed High Priest of the Church in 2001 by Magistra Blanche Barton. Within the church, he is known as Magus Peter H. Gilmore, High Priest of the Church of Satan. As a representative of the Church of Satan, Gilmore has been interviewed on numerous television and radio programs dealing with the topic of Satanism, including appearances on The History Channel, BBC, The Sci-Fi Channel, Point of Inquiry, and Bob Larson's Christian radio show. Gilmore has collaborated with death metal band Acheron in their earlier releases.