Created by H.P. Lovecraft
First and foremost, let’s get the most disappointing fact out of the way. The legend of Cthulhu isn’t part of some mysterious ancient mythology, as many likely hope. Rather, the tentacled being was a manifestation of the creative and twisted mind of author H. P. Lovecraft. In 1928, Lovecraft published The Call of Cthulhu in Weird Tales, marking the first time the Great Old One was made public. The story established much of the foundation of the Cthluhu mythos that was later branched out into a rather extensive mythology surrounding cosmic entities, cults, and madness.