"Three Treatises" is a collection of seminal works by a prominent religious reformer, focusing on the need for religious reformation and critiquing the Roman Catholic Church's practices. The first treatise discusses the Christian's spiritual nobility and priesthood, arguing that faith alone, not church rituals or hierarchy, connects one to God. The second treatise criticizes the Roman Church's wealth, advocating for the abolition of private mass and the selling of indulgences. The third treatise, written as an open letter to the Christian nobility, calls for the reform of the Church by secular authorities.

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