The white-on-black rendition of the The Sigil of Baphomet.
The "Samael/Lilith" version.
The Sigil of Baphomet is the official insignium of the Church of Satan and is trademarked and copyrighted by the Church of Satan. The image first appeared on the cover of The Satanic Mass LP in 1968 and later on the cover of The Satanic Bible in 1969.
The Church of Satan's sigil was redesigned from the original "Samael/Lilith" goat pentagram which first appeared in the book La Clef de la Magie Noire by French occultist Stanislas de Guaita, in 1897.