The Grimoire of Pope Honorius, or Le Grimoire du Pape Honorius, is a 18th to 19th century grimoire, claiming to be written by Pope Honorius III. It is unique among grimoires in that it was specifically designed to be used by a priest, and some of the instructions include saying a Mass. While its name is derived from the 13 century Grimoire of Honorius, its content is closer to later grimories like the Key of Solomon and Grimorium Verum. [1]