It’s finally October, and as the leaves change and the air turns colder, we’re getting in the mood for the beloved fall holiday Halloween. Although you may have already curated a list of spooky tunes for yourself, you might be interested to know that the tradition of spooky music goes back for centuries to a plainchant written in the 1200s. This haunting melody, known as the Dies Irae, has frightened and enthralled listeners for centuries, establishing itself as a harbinger of death and doom from Medieval times until today.