This group holds the spirits ranked as Dukes among the seventy-two demons of the Ars Goetia of the Lesser Key of Solomon. Dukes are the most numerous rank in the hierarchy, which assigns each of the seventy-two spirits a courtly title in imitation of a feudal court.
The browser will find the spirits of ducal rank. The atlas describes each spirit's attributes and seal as the seventeenth-century grimoire gives them, treating the material as a historical textual tradition.