Pope Fabian
As early as the 3rd century of Western Christianity, there is evidence of the existence of four minor orders of clergy in the Latin Church, one of which was entitled 'exorcist'. Pope Cornelius (251–253) noted that among the clergy in Rome there were fifty-two such exorcists, among other ministries listed, and the institution of these orders, and the organization of their functions, seems to have been the work of Cornelius's predecessor, Pope Fabian (236–250).