No domain of the law seems to have escaped Bentham’s reformatory activity. Based on a self-proclaimed ‘genius for legislation’, his ambition was to create a ‘complete body of laws’ or a pannomion. Within this project, constitutional law especially deserves attention. Bentham was concerned with that domain from the very beginning of his career, which started with a criticism of the philosophy of human rights and the resounding A Fragment on Government, and which ended with Constitutional Code.