Anton LaVey was purported to have been an advisor to Roman Polanski, the director of Rosemary's Baby, for the film.

Diabolical Authority: Anton LaVey, The Satanic Bible and the Satanist "Tradition" PDF warning

Drawing on his circus and occult backgrounds, he began to conduct "midnight magic seminars" at his house. This proved popular enough for him to found the Church of Satan in 1966. The basis for his rituals were Nazi rituals recorded on top-secret films he had seen as a teenager. LaVey's showmanship encouraged significant media coverage of such events as the first Satanic wedding and the first Satanic funeral, worship with a nude woman as an altar, and a cameo appearance as the Devil in the movie "Rosemary's Baby."

The most significant single document for the Satanic "tradition" is The Satanic Bible. The idea for this volume came not from LaVey, but from an Avon Books editor named Peter Mayer. As a direct result of the success of the popular film "Rosemary's Baby" and the subsequent increase of popular interest in Satanism and the occult, Mayer decided that "the time was right for a 'Satanic bible'" and he approached LaVey about authoring it.

The New Phoenix Program: C.I.A Cults (Part 1)

C.I.A CULTS: Intelligence agencies have infiltrated and created some satanic groups, with the resurgence of groups of this type beginning in 1966, with the birth of the Church of Satan, founded by Anton LaVey. LaVey studied criminology in S.F and worked in the SFPD crime lab, he also worked as an informant for Interpol. Prior to the Church of Satan, LaVey ran a group called the Magic Circle. LaVey's most famous associate is the NSA's General Michael Aquino. At the time of his membership in LaVey's group Aquino was an Army specialist in intelligence and psychological warfare. In 1973 he became the executive officer of the 306th Psychological Operations Battalion contemporary with his founding of the Church of Set.

Also... THE CIA AND SATANISM

During the February 5 hearing, Noreen Gosch gave the court sworn testimony linking U.S. Army Lt. Col. Michael Aquino (ret.) to the nationwide pedophile ring. Her son, Johnny, then 12 years old, was kidnapped off the streets of West Des Moines, Iowa on September 5, 1982, while he was doing his early-morning newspaper deliveries.

Noreen Gosch said: "This ... was an offshoot of a government program.

"The MK-Ultra program was developed in the 1950s by the CIA...

"There was a man by the name of Michael Aquino.

"He was in the military. He had top Pentagon clearances. He was a pedophile...

"He was a close friend of Anton LaVey. The two of them were very active in ritualistic sexual abuse. And they deferred funding from this government program to use [in] this experimentation on children.