"Call of Cthulhu" is a short story written by H.P. Lovecraft in 1928. It introduces the concept of ancient cosmic entities, particularly Cthulhu, a monstrous being that lies dormant beneath the sea. The narrative unfolds through the accounts of various characters who encounter strange phenomena and uncover the existence of a secret cult that worships Cthulhu. The story is structured as a series of interconnected narratives, exploring themes of madness, forbidden knowledge, and the insignificance of humanity in the vast universe. It has become a foundational work in the genre of weird fiction and has inspired numerous adaptations, games, and other media.