Horror is a genre intended to frighten or disgust readers/viewers by inducing feelings of horror and terror. The genre originated with Horace Walpole's 1765 novel The Castle of Otranto, which may be considered the first horror story. Horror has ancient roots in folklore and religious traditions focused on death, the afterlife, evil, and demons manifested as creatures like vampires, werewolves, and ghosts. Early influential horror films from Germany in the 1910s-1920s like The Cabinet of Dr. Caligari and Nosferatu helped establish the genre and used a macabre atmosphere and themes to create horror.