Trivia: When Quasimodo is singing a few minutes into the film, he is standing above the town street where people are walking around, doing business. If you look closely to the lower right of the scene, you can see Belle from "Beauty and the Beast" reading a book in her blue dress, walking.





Chosen answer: From Wikipedia: "In the High Middle Ages, [the archdeacon] was the most senior diocesan position below a bishop in the Roman Catholic Church. An archdeacon is often responsible for administration within an archdeaconry...which was the principal subdivision of the diocese." As such, in the Catholic hierarchy, the functional and administrative tasks of running the cathedrals would fall to the deacons, while the bishops would govern the pastoral and liturgical functions.
Michael Albert