The document defines key roles and organizations within the medieval Catholic church hierarchy during the Dark Ages. It describes the secular and regular clergy, with regular clergy belonging to the Catholic Church. It also outlines high-ranking officials like the Archbishop, who outranks bishops, and the Pope, who is the head of the Roman Church. Other organizations discussed include the Curia, which advises the Pope, parish churches which serve local communities, cathedrals which house bishops, basilicas in Rome, the Vatican as the authority of the Pope, dioceses under bishops, archdioceses under archbishops, monasteries and convents housing monks and nuns led by superiors like abbots and abbesses, and