Fitting and helpful a comparison between Downton Abbey and the Catholic Church? Pope Francis might say no, but I say yes. Let me explain. If you've seen Downton Abbey, you know it is a show that is as much about the servants as it is about the masters. The Earl of Grantham and his family are the centerpieces of the story, yes, but receiving just as much attention—and plot lines—are the servants: Mr. Carson and Mrs. Hughes, Bates and Anna, and so on.
If the Catholic Church's "characters" were compared to those from the show, you might be surprised at who would be who. Priests and ministers would not be the aristocrats. Rather, they would be the servants. The head butler on the show, Mr. Carson, would be the Pope. This figure is in charge of all the other servants and responsible for them. He names lower positions (valet, footman, chauffeur, etc), hires and fires, and talks predominantly with the proprietor, the Earl. Mr. Carson could be called “the servant of the servants”—another title for the Holy Father. Bishops and priests, then, would be the lower positions. (Note the hierarchy among the servants at Downton Abbey, similar to the ecclesiastical hierarchy.) While clergy may dress in fancy vestments at Mass, just like the servants' livery is elegant, those are not their clothes. They wear those in formal public settings, but most of the time otherwise they wear simple black clerics. The servants may walk through and see the beautiful rooms and gardens of the palace at Downton Abbey, but their quarters, where they spend the majority of their time, are simple. It's similar to a church versus a rectory.
There's more to compare, but let's end with the final comparison: the masters. Who is the Earl and his family? You all. You are who we serve.