This chapter discusses the question of the plurality of historical genres practiced by historians, and their function as a galvanizer of the classics. I proceed first (‘Taxonomies’) by analyzing the theories, definitions, and taxonomies of historical genres developed by ancient scholars such as Cicero and Dionysius to the modern taxonomical project by twentieth century scholars. In the second section (‘Developments’), I provide a brief history of the development of historical genres over time, focusing especially on the moment of their emergence, from ancient and medieval ethnographies, biographies, genealogies, and chronicles to modern monographs and papers. In the last section (‘Reappraisals’), I combine the premodern and modern approaches described in the first two sections, assuming postmodern theories to apply them to the discernment of the classic and the canon in history/historiography. To conclude, I propose an ethical purpose that make historians more attentive to the new developments and possibilities of historical genres, to better adapt the historical form to its content, making it compatible with respect and appreciation for the classics of the discipline. A more comprehensive and flexible approach to historical genres may facilitate the task of those who envisage a more creative and innovative historical writing and production.