Abstract. This article presents the principle of constructing the boundaries of historical research in the context of the implementation of the principle of transdisciplinarity. We can distinguish the following hierarchy of interdisciplinary research: multidisciplinary, interdisciplinary and transdisciplinary research. The transdisciplinary approach is a new step in the integration experience of interdisciplinary synthesis. The rejection of the principle of holism and the Cartesian division of research fields reduces the importance of disciplinary boundaries, expands the possibilities of humanitarian research, and makes it possible to introduce methodological rhizomes into the practice of historical research. Transdisciplinarity retains the concept of transconstruction from the rhizomatic approach, but limits it to the scope and objectives of a separate study, the subject of which can itself be created at the intersection of sciences, which is of particular importance in such areas of historical knowledge as: intellectual history, new social history, gender history, the history of mentalities, the history of transfers, etc. The new principle of building research boundaries is based on the needs and tasks of individual historical research, the specifics of the historical sources involved. Transdisciplinarity is built taking into account the individuality of sciences, takes into account the principle of openness of scientific knowledge, preserves their cultural identity in the unity of the universe. Modern transdisciplinary research develops the foundations of metascience, which makes it possible to overcome the epistemological crisis of the postmodern.
Keywords: interdisciplinarity, transdisciplinarity, research boundaries, cultural turn, rhizome, research field, metascience, trans-science.