The Great God Pan is a novella written by Arthur Machen. On publication it was widely denounced by the press as degenerate and horrific because of its decadent style and sexual content, although it has since garnered a reputation as a classic of horror. Machen's story was only one of many at the time to focus on Pan as a useful symbol for the power of nature and paganism.
In Supernatural Horror in Literature H. P. Lovecraft praised the novel, saying: "No one could begin to describe the cumulative suspense and ultimate horror with which every paragraph abounds"; he added that "the sensitive reader" reaches the end with "an appreciative shudder." Lovecraft also noted, however, that "melodrama is undeniably present, and coincidence is stretched to a length which appears absurd upon analysis."