Wikimore

English: Satanism refers to a group of religious, philosophical, or ideological beliefs that are based upon Satan, also called Lucifer. The Satanist groups can be divided into theistic Satanism and symbolic Satanism. The Church of Satan and The Satanic Temple regard Satan only as a symbol, and does not believe in a supernatural Satan.

Symbols of satanism

The inverted pentagram

The inverted pentagram is often used to represent Satanism.
The circumscribed inverted pentagram is also known as a pentacle.
OED: "Pentacle, A pentagram, esp. one enclosed in a circle."

Baphomet

Baphomet. Illustration by Éliphas Lévi, 1856.
Color version.
A greeting card.

Other

Inverted cross as The Hanged Man in Satanic Tarot.
Sigil of Lucifer.
Black sulfur, alchemical symbol.
Also known as a Brimstone, Leviathan Cross or Satan's Cross.
Proposed Satanic Pride flag.
Countryball.
Sigil of Lilith, 2007.

Church of Satan

The Sigil of Baphomet is the official insignia of the Church of Satan and LaVeyan Satanism.
The original Sigil of Baphomet.
Peter H. Gilmore, High Priest of the Church of Satan.

The Satanic Temple

The headquarters of the Satanic Temple and Salem Art Gallery in Salem, Massachusetts.
Lucien Greaves, spokesperson for The Satanic Temple.
Priestess Shiva Honey sitting with the Baphomet statue at The Satanic Temple Salem.
Shiva Honey's photo for her book The Devil's Death: Your Satanic Companion for Grief and Dying.
Admission to Salem Art Gallery.

In culture

Twin Temple.
Sign of the horns as a salutation.