Since the advent of "interdisciplinary studies," the new pathways of theological inquiry that have come about deserve appreciation as outgrowths of late twentieth-century critiques of the Enlightenment. However, it is my contention that this trajectory is better understood from the vantage point of the nineteenth century, as an intrinsic feature of the vision of Wissenschaft first modelled at the University of Berlin. It was within this context of the productive exchange between the humanities and the social sciences that there emerged at the turn of the century the Lutherrenaissance. Often overlooked is the extent to which this retrieval of Luther was driven forth by basic questions of theological method. This paper argues that in the wake of the defining dispute of the Lutherrenaissance between Karl Holl and Ernst Troeltsch, there appears in outline an innovative theological method that pursues interdisciplinarity while keeping to a clearly delineated conception of the norms of theology. First, I will begin with an overview of how the Holl-Troeltsch dispute marshalled together various streams of philosophical, historical, sociological, and political thought within a theological framework. Second, I will proceed to analyse the underlying doctrinal disagreements of this dispute to detail the theological nexus that drew together these various scholarly discourses. Third, I will conclude by examining how the culminating projects of Holl's Gewissensreligion and Troeltsch's Neuprotestantismus present competing theological methods that are rooted in a robust understanding of theology's inherent interdisciplinarity. Whether one sides with Holl, Troeltsch, or neither, each of their accounts of Luther embody a crucial inflection point in their conception of theology's consequence for its neighbouring fields. Renewed attention to the transformation of theology at this juncture in history can provide pathways for rethinking the question of interdisciplinarity today.