Would Langland's Piers the Plowman follow the Protestant or Catholic ideal, and what is supporting text?

William Langland published The Vision of
William, Concerning Piers the Plowman in 1362.
The Protestant Reformation was a movement ot the 16th century. Martin Luther, the father
of the Reformation, wrote his life changing 95 theses in
1517. It was only after this that Protestant theology came
into being and developed along lines in some regards antithetical to what we call
Catholic theology.

This shows that at the time of Langland's writing
and publication of Piers the Plowman, there was only one Western
Christian Church (Eastern Orthodoxy came into being earlier at the Great Schism of
1054) and it was the Church of Rome. It is called Catholic
because of its origins as the one "universal" Church of Christianity, which was then
called simply "the Holy Church."

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What she were witterly that wis'sed me so faire.
 1.074
"Holi Chirche I am,' quod she, 'thow
oughtest me to knowe.  1.075
I underfeng thee first and the feith taughte.”
 1.076

Therefore, it must be
said that Piers the Plowman follows the Catholic ideal, ideology,
and theology. This is one reason Langland was so popular among the clergy and rising
middle class: his didactic (instructive) poem strengthened the population's religious
beliefs.