The Temple of Elemental Evil is an aventure module for the fantasy role-playing game Dungeons & Dragons, set in the game's World of Greyhawk campaign setting. The module was published by TSR, Inc. in 1985 for the first edition Advanced Dungeons & Dragons rules. It was written by Gary Gygax and Frank Mentzer, and is an expansion of an earlier Gygax module, The Village of Hommlet (TSR, 1979). The Temple of Elemental Evil is also the title of a related 2001 Thomas M. Reid novel, and the term is used by fans of the setting to refer to the fictional Temple itself.