For ten decades, horror movies have haunted cinema screens and have been one of Hollywood’s longest-running genres alongside the western. Since Nosferatu (one of the earliest movies in the genre) was released in 1922, the blood and gore, the suspenseful and unsettling music, and the iconic scary villains that followed have been historic trademarks in movies that have terrified several generations of movie-goers.
Source: 100 Years of Horror: The Defining Horror Movie From Each Decade