Howard Phillips Lovecraft (20 August 1890 - 15 March 1937) was an American writer of weird fiction and horror fiction, who is known for his creation of what became the Cthulhu Mythos. Lovecraft was relatively unknown during his lifetime. While his stories appeared in prominent pulp magazines such as Weird Tales not many people knew his name. Throughout his adult life, Lovecraft was never able to support himself from earnings as an author and editor. He was almost exclusively published in pulp magazines before he died in poverty at the age of 46, but is now regarded as one of the most significant 20th-century authors of supernatural horror fiction. Among his most celebrated tales are "The Call of Cthulhu", "The Rats in the Walls," At the Mountains of Madness, The Shadow over Innsmouth, and The Shadow Out of Time.