For what it's worth (probably very little), in the game Assassins Creed Unity, which takes place during the French Revolution, there are two side missions, "The Cult of Baphomet", and, "The Ritual of Baphomet". You are asked to steal some chalices, and then to find and kill some weird priest-type people in an underground tomb/catacomb.
I know this is just from a vidyagame but the AC series is known for doing their historical research on most aspects of their games.