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Cthulhu

Cthulhu is a fictional cosmic entity created by American horror writer H.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 26, 2026|2 min read| Fact-checked

Cthulhu is a fictional cosmic entity created by American horror writer H. P. Lovecraft, first introduced in the 1928 short story "The Call of Cthulhu." It is one of the best-known figures in the Cthulhu Mythos, a shared fictional universe developed from Lovecraft’s work and later expanded by other writers. Cthulhu is commonly depicted as a vast, monstrous being associated with ancient powers, madness, and hidden knowledge.

Origins

Cthulhu was created by H. P. Lovecraft and first appeared in "The Call of Cthulhu" in 1928. The figure became one of the core images associated with Lovecraftian horror.

Role in the Cthulhu Mythos

Cthulhu is part of the Cthulhu Mythos, a loosely connected body of fictional lore originating with Lovecraft and later expanded by other writers. In that setting, Cthulhu is usually treated as an ancient, malevolent cosmic being.

Depiction and characteristics

Cthulhu is commonly described as a giant, tentacled, winged creature with a humanoid shape. Sources in the mythos associate it with a deathlike sleep beneath the sea and with the submerged city of R'lyeh.

Cultural impact

Cthulhu has become a widely recognized symbol of cosmic horror and has inspired many books, games, encyclopedic reference works, and later fictional reinterpretations. Reference books on the mythos regularly include extensive entries on Cthulhu and related figures.

Key facts

  • Cthulhu originated in Lovecraft’s 1928 story "The Call of Cthulhu."
  • The name became central to the broader Cthulhu Mythos, a shared fictional setting built from Lovecraft’s work and later contributions by other authors.
  • Cthulhu is often described as one of the Great Old Ones, a group of ancient, powerful beings in the mythos.
  • Popular descriptions portray Cthulhu as a sleeping entity beneath the ocean, associated with R'lyeh.
  • The character has become a major icon of horror fiction and related games, books, and derivative works.
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Canadian context

Cthulhu has strong relevance to Canadian readers through the broad international popularity of Lovecraftian horror in books, games, and reference works sold and discussed in Canada. Canadian horror and fantasy fandoms also frequently use Cthulhu as a cultural reference point.

Frequently asked questions

What is Cthulhu?
Cthulhu is a fictional cosmic entity created by H. P. Lovecraft and introduced in 1928 as part of the Cthulhu Mythos.
Is Cthulhu a god?
In the mythos, Cthulhu is usually treated as a powerful Great Old One rather than as a traditional deity.
Where does Cthulhu appear first?
Cthulhu first appears in Lovecraft’s short story "The Call of Cthulhu".
What does Cthulhu look like?
It is commonly depicted as a huge, octopus-headed, winged, humanoid monster.
What is R'lyeh?
R'lyeh is the submerged city where Cthulhu is said to lie dreaming beneath the sea.

References

  1. Wikipediahttps://en.wikipedia.org/wiki/Cthulhu_Mythos
    Supports: Cthulhu’s origin in Lovecraft’s work, the shared-universe nature of the Mythos, and the 1928 first publication of "The Call of Cthulhu."
  2. Wikisourcehttps://en.wikisource.org/wiki/Portal:Cthulhu_Mythos
    Supports: The Cthulhu Mythos as a shared fictional universe and the naming of the Mythos after Cthulhu.
  3. H.P. Lovecraft Wiki (Fandom)https://lovecraft.fandom.com/wiki/Cthulhu_Mythos
    Supports: Descriptions of the Mythos, Great Old Ones, and Cthulhu’s association with R'lyeh and the ocean.
  4. Amazonhttps://www.amazon.com/Encyclopedia-Cthulhiana-Lovecraftian-Cthulhu-Fiction/dp/1568821190
    Supports: Publication and scope of *The Encyclopedia Cthulhiana* as a guide to the Mythos and its major entities.
  5. Goodreadshttps://www.goodreads.com/book/show/1256364
    Supports: Description of *The Cthulhu Mythos Encyclopedia* as a broad reference work covering Cthulhu, related characters, places, and later derivative works.
  6. Amazonhttps://www.amazon.com/Cthulhu-Mythos-Encyclopedia-Daniel-Harms/dp/1934501050
    Supports: Identification of the reference work as an encyclopedia about the Cthulhu Mythos.