The papesse as allegory of the Church has been pretty well documented especially by Ross.
In various posts I have made over the years, I tend to also more strongly suggest that she could also be seen as representative of Mary, and suggest various reasons as to why this is the case based on especially 'confusing' details towards the bottom of the card, and 'similarities' to various depictions of the Annunciation.
The difficulty in those suggestions thus far had been that Mary at the annunciation, though consistent with the overall card design, lacks a triple crown. In contrast, Mary crowned as Queen of Heaven (following her ascension) is normally crowned with a 'normal' crown.
I was therefore please to find a new (well, OLD, but new to me, and as far as I'm aware not presented to the tarot community) triple-crowned image of Mary in the Cambridge online library
It's also interesting to note that this comes from a Royal Charter of King Henry VI, dating from 1446. Ie, from the period of tarot's early development.