Once early Enlightenment writers and their predecessors, such as Bacon, Hobbes, and Spinoza, had exposed many religious notions as mere superstitions, at least four different types of critique came to be widely adopted. The three Critiques, however, all investigate basic human abilities and the strictly a priori laws that underlie them. Immanuel Kant's basic philosophical and religious idea is also speaking against a fourth Critique, namely, the idea that religion is obliged to morality. One could assume that the Religion simply extends Kant's pure philosophical theology. He takes a closer look at one specific religion, thereby adding a new element to the debate, with respect both to its contents and to its methodology. The content deals with the four building blocks of Christianity: original sin, Christ, judgment day, and the Church. Even a superficial reading of Kant's text on religion reveals eight particularities.