A novel interpretation of Heidegger's project in the late twenties and of its breakdown and transformation around the turn of the decade. I argue that Heidegger develops a unified project in the late Marburg period that is constructed around the question of the unity of the concept of being in light of its regional multiplicity. Furthermore, I argue that Heidegger's conception of the framework of this project is highly influenced by his reception of Kant in this same period. Specifically, I identify the elements of the Kantian framework that Heidegger retains and appropriates for his project, as well as those elements that he rejects. In the former case, Heidegger takes up primarily Kant's framework of a priori transcendental conditions that are to make empirical experience possible, which Heidegger reformulates in terms of the preunderstanding of being that makes possible the apprehension of entities. In the latter case, I isolate two primary criticisms that will serve as desiderata for the execution of Heidegger's project, namely: that the categories have an excessively subjectivistic status, and that they are based solely on logical functions of judgement. The former constitutes a problem because the location of the categories on the subject side makes difficult their applicability to the objective realm, and lead Heidegger to reject both the quid juris form of posing the question as well as the results of the transcendental deduction in general.