Farmer Giles of Ham - obviously Catholic?

[Estelyn Telcontar]

In their Introduction to the edited edition of Farmer Giles, Hammond and Scull specify the "historical" time as given by Tolkien in his Forward:

...between the end of the third century (the time of King Coel) and the early sixth century (the rise of the Seven Kingdoms of the English)...

So it is definitely pre-Arthurian. However, that is not important; they go on to say:

Its 'medieval' setting is merely an appropriate background for a tale of dragons and knights, against which Tolkien places anachronisms for humorous effect...