Illuminatus may refer to: singular of Illuminati Illuminatus of Arce (fl. 1219), companion of Saint Francis Illuminatus of Assisi (d. c. 1281), bishop The Illuminatus! Trilogy (1975), a series of novels by Robert Shea and Robert Anton Wilson Illuminatus (band), an alternative metal band from Nottingham Illuminatus (video game), a computer game originating from an April fool's joke