Mysterium is an unfinished musical work by composer Alexander Scriabin.
Scriabin planned that the work would be synesthetic, exploiting the senses of smell and touch as well as hearing.
At the time of his death, Scriabin had sketched 72 pages of a prelude to the Mysterium, entitled Prefatory Action.
Scriabin's Mysterium is depicted in Issue 3 of the graphic novel trilogy Suffrajitsu: Mrs. Pankhurst's Amazons (2015).
The Black Tapes podcast (2015–2017) uses Scriabin's Mysterium as a potential example of someone trying to access supernatural forces.