Together with Theodor Mommsen, Hermann Dessau (1856-1931) shaped the course of classical studies at the Prussian Academy of Science for several decades. This volume of papers analyses the conditions under which the Jewish scholar worked, as well as the main topics of his research: the edition and commentary of Latin inscriptions (CIL, ILS), research on the Historia Augusta, prosopography of the Ancient World (PIR) and Roman Imperial history. The papers presented here are supplemented by an edition of his most important academic correspondence.