Gimoire of Honorius is a medieval grimoire. Its date of composition is uncertain, but it is mentioned as liber sacer in the 13th century, apparently asserting a high medieval date. Johannes Hartlieb (1456) mentions it as one of the books used in nigromancy. The oldest preserved manuscript dates to the 14th century, Sloane MS 3854 (fol 117-144). Sloane MS 313, dating to the late 14th or early 15th c. had been in the possession of John Dee. The book is one of the oldest existing medieval grimoires as well as one of the most influential.
The book can be classified as a "Solomonic Grimoire" due to its heavy use of angelic powers and seals like those found in The Greater Key of Solomon. This book was credited to Pope Honorius III, who succeeded Pope Innocent III in 1216.
Gimoire of Honorius
Liber Juratus Honorii