ABSTRACTThis paper aims to rebuild the relationship between the Seinsfrage and Catholicism in Heidegger’s meditation and to shed light on his critique to Christianity as a philosophical necessity rooted in his broader critique of modernity in the context of the Black Notebooks. In order to reach these purposes, this contribution will be articulated in two parts: in the first one, I will rebuild Heidegger’s relationship to Catholicism and in the second one, I will focus on Black Notebooks as important tools (...) in understanding Heidegger’s critique to Catholicism, a critique that is built on three levels: historical, speculative and political. The essay will show how the Schwarze Hefte illuminate Heidegger’s attempts to answer the question of Being in an incessant tension with the coeval seven major treatises on the Seinsgeschichte, in which Christianity, metaphysics and nihilism are inextricably tied together. (shrink)