Originating as a dispute between two eminent historians, Heinrich von Treitschke and Theodor Mommsen, the 'Berlin dispute on anti-Semitism' (1879--1881) not only polarized German society under Kaiser Wilhelm II; its influence was still evident in National-Socialist propaganda. This comprehensive source edition encompasses a total of 121 chronologically listed texts including memoranda, articles, speeches, letters, commentaries etc. It documents the course of the dispute between Treitschke and Mommsen and sheds light on the debates on this topic amongst their contemporaries. This work is rounded off by a chrononlogical table and an index of names featuring biographical details. This source edition shows the anti-Jewish agitation of the late 19th century and its far-reaching consequences in a new light.